Co-reporter:Lvyuan Ye;Liqiang Wan;Farong Huang
New Journal of Chemistry (1998-Present) 2017 vol. 41(Issue 11) pp:4424-4430
Publication Date(Web):2017/05/30
DOI:10.1039/C7NJ00610A
A class of coordination-driven polytriazole metallogels were prepared via a copper(I)-catalyzed azide–alkyne cycloaddition (CuAAC) polymerization in a one-pot process. The properties of the obtained metallogels were characterized using Fourier transform infrared spectra, scanning electron microscopy, rheology and self-healing tests, etc. The coordination interactions between Cu+ and the polytriazoles were investigated through nuclear magnetic resonance, differential scanning calorimetry, and X-ray diffraction analysis techniques. The metallogels possess good thermal stability and exhibit strong self-healing abilities. The coordination interactions contribute to the physical cross-linking and interchain π–π aromatic stacking of polytriazole macromolecules, which result in network structure induced gelation.
Co-reporter:J. Tang;L. Wan;Y. Zhou;H. Pan;F. Huang
Journal of Materials Chemistry A 2017 vol. 5(Issue 40) pp:21169-21177
Publication Date(Web):2017/10/17
DOI:10.1039/C7TA06650C
Self-healing adhesives (SHAs) are derivatives of self-healing materials with remarkable practical potential for re-bondable, adjustable and long-term adhesion. However, reports of SHAs are extremely limited because it is difficult to meet both of the two requirements, high strength and efficient self-healing properties, which may greatly limit their application. In this study, the bottleneck is overcome by introducing alternating rigid and flexible segments in the dynamic quaternization cross-links of poly(1,2,3-triazolium) vitrimer (VPTA) adhesives. In consequence, the VPTA adhesive demonstrates a particularly high adhesive strength of 23.7 MPa, compared to the reported SHAs (≤7.5 MPa). The adhesive joints of VPTA can self-heal after it is completely broken 20 times, while maintaining strengths all above 10 MPa, which is rarely reported. Furthermore, this adhesive also exhibits excellent solvent resistance, high durability, and good creep resistance. The structural design strategy may serve as a versatile method for polymers to prepare strong and efficient SHAs.
Co-reporter:Junkun Tang;Liqiang Wan;Yan Zhou;Lvyuan Ye
Journal of Solid State Electrochemistry 2017 Volume 21( Issue 3) pp:725-734
Publication Date(Web):2017/03/01
DOI:10.1007/s10008-016-3421-2
Sulfonated polytriazole (SPTA) proton exchange membranes (PEMs) with a series of sulfonation degrees was synthesized based on click chemistry from a rigid diazide monomer, 4,4′-bis(azidomethyl)-1,1′-biphenyl (BAMB), with 2,2-bis[(4-propargyloxy)phenyl]propane (BPBPA) and 4,4′-diazido-2,2′-stilbenedisulfonic acid disodium salt (DSDA). The structure of the copolymers was characterized by nuclear magnetic resonance (NMR) and gel permeation chromatography (GPC). As a result of the introduction of rigid biphenyl structure and the ionic interaction between triazole rings and sulfonic acid groups, the SPTA membranes exhibited higher water uptake and lower swelling ratio compared to NRE211 membrane, indicating excellent dimensional stability. AC impedance revealed that the proton conductivity of SPTA membranes ranged from 2.5 to 35 mS/cm at 30 °C and 13–105 mS/cm at 80 °C. Besides, the membranes have high thermal and oxidative stability, good mechanical property, and low methanol permeability as well.
Co-reporter:Xiaojun Bu;Yan Zhou;Chuan Li ;Farong Huang
Journal of Applied Polymer Science 2016 Volume 133( Issue 43) pp:
Publication Date(Web):
DOI:10.1002/app.44158
ABSTRACT
Octakis(ethynyldimethylsiloxy)silsesquioxane (OEMS) was first synthesized via hydrolysis condensation reaction between tetramethylammonium octaanion and ethynyldimethylchlorosilane, and characterized by FT-IR, NMR, and GPC methods. A series of OEMS modified poly(silicane arylacetylene) resins (OEMS-PSAs) were prepared from OEMS and poly(silicane arylacetylene) (PSA). TEM analysis of the OEMS-PSAs confirms that the nano-sized polyhedral oligomeric silsesquioxanes (POSS) are dispersed evenly in low content, but aggregated unregularly in high content in OEMS-PSAs. The curing behavior of OEMS-PSAs was studied with DSC and FT-IR techniques. Nanoindentation test shows the incorporation of OEMS into PSA could decrease both of the elastic modulus and surface hardness of the PSA thermoset. The dielectric constants (ɛr) of the OEMS-PSA thermosets approach to 2.1, depending on not only the content of POSS but also the dispersion of POSS. Furthermore, TGA results demonstrate the OEMS-PSA thermosets possess the certain thermo-oxidative resistance. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 44158.
Co-reporter:Yan Zhou;Farong Huang;Lei Du;Guozheng Liang
Polymer Engineering & Science 2015 Volume 55( Issue 2) pp:316-321
Publication Date(Web):
DOI:10.1002/pen.23899
A series of silicon-containing arylacetylene resins containing polyhedral oligomeric silsesquioxane (PS resins) were synthesized by the hydrosilylation reaction between poly(dimethylsilyleneethynylenephenyleneethynylene) (PMSEPE) and octakis(dimethylsiloxy)octasilsesquoixane ( ) in the presence of a platinum catalyst (Pt-dvs). The chemical structures and properties of PS resins were characterized by Fourier transform infrared spectroscopy, nuclear magnetic resonance spectroscopy, rheological analysis, differential scanning calorimetry, dielectric measurement, thermogravimetric analysis, and scanning electron microscopy. The results show that PS resins can be crosslinked to form thermosets at temperatures less than 260°C. With the increment of , the dielectric constants of the thermosets gradually decrease from 2.91 to 2.73. The thermooxidative stabilities of PMSEPE thermosets are obviously improved with the incorporation of . POLYM. ENG. SCI., 55:316–321, 2015. © 2014 Society of Plastics Engineers
Co-reporter:Yujing Li, Liqiang Wan, Farong Huang, Lei Du
Journal of Molecular Liquids 2014 196() pp: 238-243
Publication Date(Web):
DOI:10.1016/j.molliq.2014.03.047
Co-reporter:Yujing Li, Liqiang Wan, Hao Zhou, Farong Huang and Lei Du
Polymer Chemistry 2013 vol. 4(Issue 12) pp:3444-3447
Publication Date(Web):10 Apr 2013
DOI:10.1039/C3PY00227F
A novel organogel in dimethyl formamide or dimethyl sulphoxide (DMF or DMSO), named GelT, was prepared by Cu(I)-catalyzed “click” reaction between diazide and dipropargyl bisphenol A. The action between copper ions and triazole rings was confirmed to be the mechanism of formation of the gel.
Co-reporter:Yu Gao;Farong Huang;Yan Zhou ;Lei Du
Journal of Applied Polymer Science 2013 Volume 128( Issue 1) pp:340-346
Publication Date(Web):
DOI:10.1002/app.38184
Abstract
A novel acetylene- and maleimide-terminated benzoxazine, 3-(3-ethynylphenyl)-3,4-dihydro-2H-6-(N-maleimido)-1,3-benzoxazine (MBZ-apa), was successfully synthesized with N-(4-hydroxyphenyl)maleimide, paraformaldehyde, and 3-aminophenylacetylene. The structure of the benzoxazine is confirmed by FTIR and 1H-NMR spectroscopies. MBZ-apa is easily dissolved in common organic solvents. Differential scanning calorimetry (DSC) was used to study thermal cross-linking behavior of MBZ-apa. The DSC curve shows only a single exothermic peak due to the oxazine ring-opening polymerization and the polymerization of the acetylene and maleimide groups occurring simultaneously in the same temperature range. Dynamic mechanical analyses (DMA) reveals that the novel polybenzoxazine exhibits high glass-transition temperature (Tg) (ca. 348°C). The storage modulus arrives at 4.5 GPa in the range of room temperature to 330°C. The polybenzoxazine exhibits good thermal stability as evidenced by thermogravimetric analysis (TGA). Pyrolysis-gas chromatography/mass spectrometry (Pyrolysis-GC/MS) was employed to characterize the polybenzoxazine. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
Co-reporter:Yan Peng E, Li Qiang Wan, Yu Jing Li, Fa Rong Huang, Lei Du
Chinese Chemical Letters 2012 Volume 23(Issue 9) pp:1087-1090
Publication Date(Web):September 2012
DOI:10.1016/j.cclet.2012.06.022
A new kind of polytriazoleimide containing bisphenyl-1,2,3-triazole (BPT) was synthesized by copper-catalyzed 1,3-dipolar cycloaddition of azides and alkynes (CuAAC) and polycondensation. The thermal stability and degradation mechanism of the polytriazoleimide were investigated. The results show that the structure of BPT in polytriazoleimide transforms to phenylindole after thermal treatment, accompanying the release of N2.
Co-reporter:Canfeng Wang;Yun Jiang;Yu Gao;Yan Zhou;Farong Huang;Lei Du
Polymer Engineering & Science 2012 Volume 52( Issue 6) pp:1301-1308
Publication Date(Web):
DOI:10.1002/pen.23071
Abstract
Carborane-incorporated poly(silyleneethynylenephenyleneethynylene)s with different side groups were synthesized from corresponding poly(silyleneethynylenephenyleneethynylene)s and decaborane (B10H14) in the presence of acetonitrile through in-situ reaction. The obtained polymers with o-carborane units were characterized by using Fourier transform infrared and nuclear magnetic resonance spectroscopies, rheological measurements, differential scanning calorimetry, and thermogravimetric analysis. The results show that the properties of these carborane-incorporated polymers vary with side groups in main chains. They possess good processability and can be crosslinked to form thermosets at temperatures less than 250°C. The thermosets exhibit excellent thermal and thermooxidative stabilities. The weight losses of the thermosets heated to 800°C in air are only 10% approximately. After pyrolysis of the thermosets in nitrogen at 1000°C, the pyrolytic products have no further weight losses up to 1000°C in air. POLYM. ENG. SCI., 2012. © 2012 Society of Plastics Engineers
Co-reporter:Fuwei Huang;Farong Huang;Yan Zhou ;Lei Du
Polymer Composites 2011 Volume 32( Issue 1) pp:125-130
Publication Date(Web):
DOI:10.1002/pc.21027
Abstract
Nanocomposites were prepared from the resin of 4,4′-bismaleimido-diphenylmethane (BDM) with dipropargyl ethers of hexafluorobisphenol A (DPBPF) and octaphenylsilsesquioxane (OPS) or nano-SiO2. The nanocomposites were characterized by Fourier transform infrared spectroscopy, scanning electron microscope, dynamic mechanical analysis and thermogravimetric analysis. The results exhibited that OPS or nano-SiO2 particles could be easily dispersed in the nanocomposites and the glass transition and decomposition temperatures of c-BDM-DPBPF-OPS and c-BDM-DPBPF-SiO2 nanocomposites were higher than those of c-BDM-DPBPF resin. The reinforcement of OPS was more effective than that of nano-SiO2 in the nanocomposites. POLYM. COMPOS., 2011. © 2010 Society of Plastics Engineers
Co-reporter:Fei Gao, Farong Huang, Lemin Tang and Lei Du
Polymer Journal 2011 43(2) pp:136-140
Publication Date(Web):November 24, 2010
DOI:10.1038/pj.2010.118
A series of poly(multidimethylsiloxane-1,4-ethynylenephenyleneethynylene)s were synthesized by condensation reactions of 1,4-diethynylbenzene magnesium reagents with various α,ω-dichlorodimethylsiloxanes. The polymers obtained were solids or viscous liquids and are soluble in common organic solvents at room temperature. The structures and properties of the polymers were characterized by Fourier transform infrared, 1H nuclear magnetic resonance (NMR), 13C NMR, differential scanning calorimeter (DSC), dynamic mechanical analysis (DMA) and thermogravimetric analysis (TGA) techniques. DSC analyses showed that these polymers can be thermally cured to form highly crosslinked structures. DMA studies revealed that the glass transition temperatures of the cured polymers decreased with increasing siloxane chain length. TGA measurements showed that the cured polymers were thermally stable up to almost 450 °C in both N2 and air. With increasing length of the siloxane units, the thermal stability of the cured polymers decreased. Silicon oxycarbide ceramics with high thermal stability were produced when the cured polymers were pyrolyzed at 1200 °C under argon.
Co-reporter:Xiaofei Wang, Liqiang Wan, Farong Huang, Lei Du
Materials Letters 2011 Volume 65(Issue 2) pp:268-270
Publication Date(Web):31 January 2011
DOI:10.1016/j.matlet.2010.09.082
Copper-catalyzed Azide-Alkyne Cycloaddition (CuAAC) was used to synthesize a new series of maleimides with triazole ring moieties (triazole-maleimides, TA-MIs). The physical and thermal properties of the obtained TA-MIs were studied. The TA-MIs showed good solubility in non-proton strong polar solvents such as DMF, DMAc and NMP. The polymerization of TA-MIs can be carried out at a temperature ranged from 140 °C to 250 °C. Td5 of the resulted poly(TA-MIs) reached 335–345 °C under nitrogen.
Co-reporter:Xiaofei Wang;Liqiang Wan;Yanpeng E;Farong Huang;Lei Du
Journal of Applied Polymer Science 2011 Volume 120( Issue 1) pp:419-424
Publication Date(Web):
DOI:10.1002/app.33157
Abstract
Crosslinked structures of a resin had a great influence on its properties. Studying the effect of a crosslinked network on resin properties will benefit to design and prepare a new resin with good performances. A series of alkyne group-capped oligomers were designed and well characterized. The corresponding crosslinked polytriazoles with different network grids were obtained when multifunctional azide monomer was used as a crosslinking agent. The glass transition temperature (Tg) of the crosslinked polytriazoles was measured by Differential Scanning Calorimetry. The results showed networks with a small grid size would exihibit high Tgs. The relationship between Tg and the size of the network grids of the crosslinked polytriazoles was discussed. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
Co-reporter:Canfeng Wang, Yan Zhou, Farong Huang, Lei Du
Reactive and Functional Polymers 2011 71(8) pp: 899-904
Publication Date(Web):August 2011
DOI:10.1016/j.reactfunctpolym.2011.05.005
Co-reporter:Zhen-yu Jiang;Yan Zhou;Fa-rong Huang 黄发荣;Lei Du
Chinese Journal of Polymer Science 2011 Volume 29( Issue 6) pp:
Publication Date(Web):2011 November
DOI:10.1007/s10118-011-1086-y
A modified silicon-containing arylacetylene resin with a well-defined organic-inorganic POSS functionality was successfully synthesized by Huisgen azide-alkyne 1,3-dipolar cycloaddition. The POSS hybridized resin exhibits excellent thermal properties which were characterized by differential scanning calorimetry (DSC) and thermogravimetric analyses (TGA). Scanning electron microscope (SEM) was used to characterize fracture surface of the hybridized polymer. The results show that phase separation occurs. The POSS moieties are aggregated each other in the polymer to form 200–400 nm domains.
Co-reporter:Fei Gao;Lingling Zhang;Lemin Tang;Farong Huang;Lei Du
Journal of Polymer Research 2011 Volume 18( Issue 2) pp:163-169
Publication Date(Web):2011 March
DOI:10.1007/s10965-010-9403-7
Poly(tetramethyldisiloxaneethynylenephenyleneethynylene) resins were synthesized by polycondensation reactions of the bismagnesium derivative of p- or m-diethynylbenzene with 1,3-dichlorotetramethyldisiloxane. The molecular weights of the resins were determined by gel permeation chromatography. The structures of the resins were verified by 1H, 13C, and 29Si NMR as well as FT-IR spectroscopy. The thermal behavior of the resins was traced by differential scanning calorimetry (DSC). The resins can be thermally crosslinked through the acetylene groups to produce highly crosslinked resins which were thermally stable up to 539 °C in both nitrogen and air. Hard, black, and glassy ceramics were obtained after the sinter of the crosslinked resins at 1,450 °C. The polymers have a potential application as matrix materials for advanced composites and ceramic precursors.
Co-reporter:Jun Zou;Xuan Chen;You Shu;Haijun Zhou;Farong Huang
Polymer Bulletin 2011 Volume 66( Issue 3) pp:315-326
Publication Date(Web):2011 February
DOI:10.1007/s00289-010-0280-3
Biodegradable star-shaped PLLA–ESO copolymers were synthesized by the bulk copolymerization of l-lactide (l-LA) and epoxidized soybean oil (ESO) with stannous octanoate as the catalyst. Effects of molar ratios of monomer to catalyst, and various amounts of ESO on copolymerization were studied. The resulting copolymers were characterized by FTIR, 1H NMR, GPC, etc., which confirmed the successful synthesis of star-shaped copolymers of l-LA and ESO. The thermal and mechanical properties of samples were also investigated by means of DSC, TGA and tensile testing. The results showed that the PLLA–ESO copolymers possed lower glass transition temperature, melting point, crystallinity, and maximum decomposition temperature than those of neat polylactide. Tensile testing demonstrated that PLLA–ESO copolymer had better ductility than linear PLLA. It was also found that the amount of catalyst almost had no influence on the weight average molecular weight of PLLA–ESO copolymers, but which could be controlled by variation of molar ratios of l-LA to ESO.
Co-reporter:Fuwei Huang;Farong Huang;Yan Zhou ;Lei Du
Journal of Applied Polymer Science 2010 Volume 117( Issue 5) pp:2932-2936
Publication Date(Web):
DOI:10.1002/app.32209
Abstract
Bismaleimide (BMI) resins modified with hydrogen silsesquioxane (HSQ) and diallyl bisphenol A (DABPA) (BMI-HSQ-DABPA resins) were prepared. DSC, FTIR, and TGA were used to characterize the curing behaviors, structures, and thermal properties of the BMI-HSQ-DABPA resins, respectively. The results showed that the glass transition temperatures and thermal stabilities of the cured BMI-HSQ-DABPA resins increased with the rise of the contents of HSQ. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010
Co-reporter:Xiao'an Zhou, Liqiang Wan, Yanhong Hu, Yanpeng E, Farong Huang and Lei Du
Polymer Journal 2010 42(3) pp:216-222
Publication Date(Web):January 13, 2010
DOI:10.1038/pj.2009.337
Cu (I)-catalyzed 1,3-dipolar cycloaddition step-growth polymerization was exploited in the synthesis of a novel class of polytriazoleimides. The polymerization with diazides and imide-containing dialkynes was readily carried out under mild conditions. The chemical structures of the resulting novel polyimides were characterized by Fourier transform infrared and nuclear magnetic resonance. These polymers exhibited good solubility in common polar organic solvents such as N-methyl-2-pyrrolidinone, N,N-dimethylacetamide, dimethylformide and dimethylsulfoxide. The flexible polytriazoleimide films were easily prepared from homogeneous polyimide solutions. The films had good mechanical properties with tensile strengths of 76.2–92.4 MPa as well as elongations at breakage of 4.8–6.9%. The resulting polytriazoleimide films showed a glass transition temperature of 221–254 °C and a decomposition temperature (at 5% weight loss) of 365–377 °C in nitrogen.
Co-reporter:Fuwei Huang, Farong Huang, Yan Zhou and Lei Du
Polymer Journal 2010 42(3) pp:261-267
Publication Date(Web):January 6, 2010
DOI:10.1038/pj.2009.335
A new type of modified bismaleimide (BMI) resins with good heat resistance and processing properties for advanced composites was developed. Modifiers hydrogen silsesquioxane (HSQ), dipropargyl ethers of bisphenol A, hexafluorobisphenol A, 4,4′-dihydroxydiphenyl ether and resorcinol were used to modify 4,4′-bismaleimidodiphenylmethane. The structure of the resins was verified by Fourier transform infrared spectrometry. The relationship between viscosity and temperature was used to characterize the processability of the resins. The curing behaviors of resins were investigated by a differential scanning calorimeter. The glass transition temperatures and thermal stabilities of cured resins were investigated by dynamic mechanical analysis and thermogravimetric analysis, respectively. The relationship between structures and properties of the resins was discussed, and the mechanical properties of the glass-fiber-fabric-reinforced composites were measured.
Co-reporter:Fei Gao, Ling Ling Zhang, Fa Rong Huang, Lei Du
Chinese Chemical Letters 2010 Volume 21(Issue 6) pp:738-742
Publication Date(Web):June 2010
DOI:10.1016/j.cclet.2009.12.013
Poly[(methylsilylene ethynylene phenylene ethynylene)-co-(tetramethyldisiloxane ethynylene phenylene ethynylene)] was synthesized by polycondensation reaction of m-diethynylbenzene magnesium reagent with 1,3-dichlorotetramethyldisiloxane and dichloromethylsilane. The copolymer was characterized by FT-IR, 1H NMR, differential scanning calorimetry and thermogravimetric analysis. The results show that the copolymer exhibits good processability and cures at low temperatures. The cured copolymer shows high thermal stability.
Co-reporter:Ling-ling Zhang;Fei Gao;Can-feng Wang;Jian Zhang
Chinese Journal of Polymer Science 2010 Volume 28( Issue 2) pp:199-207
Publication Date(Web):2010 March
DOI:10.1007/s10118-010-9002-4
A series of poly[(methylsilylene ethynylenephenyleneethynylene)-co-(dimethylsilylene ethynylenephenyleneethynylene)] s were synthesized by the incorporation of various ratios of methylsilylene to dimethylsilylene units into the polymer chain backbone. The resultant copolymers were soluble in a variety of common organic solvents at room temperature. The copolymers were characterized by FT-IR, 1H-NMR, GPC, rheological analysis, differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The results showed that the copolymers exhibited good processability and cured at low temperatures like 200°C. The curing reactions involved in hydrosilylation of Si-H and alkyne groups and the polymerization of alkynes. Td5 (5% weight loss) of the cured copolymers ranged from 629°C to 686°C, and the decomposition residues of cured copolymers at 1000°C ranged from 88.1% to 90.9% under nitrogen. Thermal stability of the copolymers increased with the introduction of methylsilylene units into polymer chains. The cured copolymers were sintered at 1450°C, and the results of X-ray diffraction analysis showed that β-SiC was formed in the sintered products.
Co-reporter:Xiaofei Wang, Zhanfeng Zhao, Jianjun Tian, Liqiang Wan, Yanhong Hu, Farong Huang and Lei Du
Polymer Journal 2009 41(6) pp:498-502
Publication Date(Web):April 22, 2009
DOI:10.1295/polymj.PJ2008312
N,N-Dipropargyl-p-propargyloxyaniline (DPPA) was synthesized and characterized. A new polytriazole (PTA) resin was prepared from DPPA and 1, 3, 5-tris(azidomethyl)-2, 4, 6-trimethyl-benzene (TAMTMB). The physical properties, rheological behavior, curing behavior, thermal and mechanical properties of the PTA resin were investigated. The results showed that the PTA resin could cure initially at 70 °C and completely at 200 °C. The cured PTA resin had good heat resistance and high mechanical properties.
Co-reporter:Jianxiang Huang;Liqiang Wan;Jian Zhang;Fei Gao;Jianjun Tian;Farong Huang;Lei Du
Journal of Applied Polymer Science 2009 Volume 114( Issue 3) pp:1725-1730
Publication Date(Web):
DOI:10.1002/app.30433
Abstract
4,4′-Diazidomethylbiphenyl (DAMBP) and poly(dimethylsilylene-ethynylenephenyleneethynylene) (PDMSEPE) were thermally polymerized to form a novel silicon-containing polytriazole resin (PDMSEPE-DAMBP) by 1,3-dipolar cycloaddition. Differential scanning calorimetry, FTIR, and 13C-NMR were used to characterize the curing behaviors of PDMSEPE-DAMBP resins. The results indicated that the resins could cure at temperatures as low as 80°C. Dynamic mechanical analysis showed that there was a glass transition at 302°C for the cured PDMSEPE-DAMBP resin. The carbon fiber (T700) reinforced PDMSEPE-DAMBP composites exhibited excellent mechanical properties at room temperature and high property retention at 250°C. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009
Co-reporter:Jianxiang Huang;Wei Du;Jian Zhang;Farong Huang;Lei Du
Polymer Bulletin 2009 Volume 62( Issue 2) pp:
Publication Date(Web):2009 February
DOI:10.1007/s00289-008-0003-1
An acetylene-functional benzoxazine (AFBEN) which was used to modify poly(dimethylsilyleneethynylenephenyleneethynylene) (DMSEPE) was synthesized by a solventless procedure. The modified resins (DMSEPE/AFBEN) were obtained by blending DMSEPE and AFBEN in different amount. The thermopolymerization of DMSEPE/AFBEN resins were investigated by DSC technique. The dynamic mechanical analysis showed that the storage modulus (E) of the cured DMSEPE/AFBEN resin containing less than 30 wt% AFBEN did not decrease at the temperature lower than 500 °C. When the AFBEN loading increased from 20 to 100 wt%, a decrease in glass transition temperature from 523 to 342 °C was observed. The thermal stability of the cured DMSEPE/AFBEN resins was determined by thermogravimetric analysis (TGA) in N2 and air. The TGA results showed the cured DMSEPE/AFBEN resins had good thermal stability. The carbon fiber (T700) reinforced DMSEPE/AFBEN composites exhibited excellent mechanical properties (flexural strength: 1,694 MPa) at room temperature and high strength remaining of 76% at 300 °C.
Co-reporter:Qiang Li, Yan Zhou, Xiaodong Hang, Shifeng Deng, Farong Huang, Lei Du, Zhongpin Li
European Polymer Journal 2008 Volume 44(Issue 8) pp:2538-2544
Publication Date(Web):August 2008
DOI:10.1016/j.eurpolymj.2008.06.018
A novel arylacetylene oligomer containing octamethyl POSS units in main chains was prepared from difluoride octamethyl POSS (diexo-(CH3)8Si8O11F2) and diethynylbenzene (DEB) by Grignard reaction and characterized by FT-IR, NMR, WAXD, GPC, DSC, and TGA. The curing reaction kinetic of the oligomer was studied by Kissinger and Ozawa methods and the kinetic parameters were obtained. The cured polymer had good thermal and thermal-oxidative properties. TGA analyses demonstrated that the thermal decomposition temperature (Td5) of the cured polymer in nitrogen and air were 503 and 479 °C, respectively.
Co-reporter:Zhuxia Rong;Fuwei Huang;Xuening Shen ;Farong Huang
Polymer Composites 2008 Volume 29( Issue 5) pp:483-488
Publication Date(Web):
DOI:10.1002/pc.20382
Abstract
A kind of modified bismaleimide resin, with good heat resistance and processing properties for advanced composites, was developed. The modifier, dipropargyl ether of bisphenol A (DPBPA), was prepared by a phase-transfer catalyzing procedure, characterized by FTIR, 1H NMR, and elementary analysis, and used to modify 4,4′-bismaleimidodiphenylmethane (BMDPM). The thermopolymerization of a DPBPA-modified BMDPM resin was followed up by FTIR. The curing of the resin was investigated by differential scanning calorimeter and gelation characterization. The relation of viscosity and temperature was used to characterize the processability of the resin. The results of DMA analysis showed that the cured DPBPA-modified BMDPM resins had a glass transition temperature higher than 320°C. The carbon fiber (T700) reinforced composites showed excellent flexural properties at ambient temperature and at 250°C. DPBPA could effectively improve mechanical properties without deteriorating heat resistance of the BMDPM resin a lot. POLYM. COMPOS., 2008. © 2008 Society of Plastics Engineers
Co-reporter:Jianjun Tian;Liqiang Wan;Jianzhi Huang;Yanhong Hu;Farong Huang
Polymer Bulletin 2008 Volume 60( Issue 4) pp:457-465
Publication Date(Web):2008 April
DOI:10.1007/s00289-007-0878-2
A new kind of polytriazole resins were prepared from a triazide and a dialkyne compounds and characterized.
These resins can be cured at 80 °C. The curing process for a resin was traced by FT-IR. The glass
transition temperature Tg and thermal decomposition temperature Td5
of the cured resin with the molar ratio of azide group to alkyne group [a]/[b]=1.0:1.0 reach 216 °C
and 360 °C, respectively. The flexural strength of the cured resin and its glass fiber reinforced
composite arrive at 183.6 MPa and 963.4 MPa, respectively. The resin would be a good candidate for
the matrices of advanced composites.
Co-reporter:Fuwei Huang;Zhuxia Rong;Xuening Shen;Farong Huang;Lei Du;Zhongping Li
Polymer Engineering & Science 2008 Volume 48( Issue 5) pp:1022-1028
Publication Date(Web):
DOI:10.1002/pen.21046
Abstract
Octa(aminophenyl)silsesquioxane (OAPS) was prepared in two steps by the nitration of octaphenylsilsesquioxane (OPS) in fuming nitric acid to form octa(nitrophenyl)silsesquioxane (ONPS), followed by the mild reduction of ONPS with Pd/C as a catalyst. OPS, ONPS and OAPS were characterized by FTIR, 1H NMR, and 29Si NMR techniques. Modification of a bismaleimide (BMI) resin with OAPS and dipropargyl ether of bisphenol A (DPBPA) was investigated. The modified resins, OAPS/DPBPA/BMI, were characterized with DSC, FTIR and rheology analyses. The results showed that the modified resins have good processability. The DMA results indicated that the glass transition temperature (Tg) of the cured OAPS/DPBPA/BMI hybrid resins reached 350°C. The decomposition temperature (Td5) of the cured resins decreased but the char yield (Yc, 800°C) increased as the OAPS loading increased, especially in air. POLYM. ENG. SCI., 2008. © 2008 Society of Plastics Engineers
Co-reporter:Liqiang Wan;Yonghong Luo;Lian Xue;Jianjun Tian;Yanhong Hu;Huimin Qi;Xuening Shen;Farong Huang;Lei Du;Xiangbao Chen
Journal of Applied Polymer Science 2007 Volume 104(Issue 2) pp:
Publication Date(Web):26 JAN 2007
DOI:10.1002/app.24849
A novel polytriazole resin prepared from p-xylylene diazide (XDA) and N,N,N′,N′-tetrapropargyl-p,p′-diaminodiphenylmethane (TPDDM) was synthesized and characterized. The resin is soluble in common solvents like acetone. The results show that the polytriazole resin can be cured at 70°C. The glass transition temperature and thermal decomposition temperature of the cured resin are 218 and 350°C, respectively. The tensile and flexural strengths of the cured resin achieve 99.0 and 200 MPa, respectively. It is potential as a low cost and easy processing thermal resistant polymer matrix for advanced composite applications. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 104: 1038–1042, 2007
Co-reporter:Yanhong Hu;Liqiang Wan;Jianzhi Huang;Farong Huang;Jianjun Tian;Lei Du
Polymers for Advanced Technologies 2007 Volume 18(Issue 7) pp:556-561
Publication Date(Web):3 APR 2007
DOI:10.1002/pat.917
A novel low-temperature curing polytriazole resin was prepared from a triazide and a tetraalkyne and characterized. The resin can be cured at 70°C. The glass transition temperature Tg and thermal decomposition temperature Td5 of the cured resin with the molar ratio of azide to alkyne group [A]/[B] = 1.0:1.0 reached 324 and 355°C, respectively. The study on the curing kinetics of the resin shows that the apparent activation energy of the curing reaction is 93 kJ mol−1. The flexural strength of the cured resin reached 137.6 MPa at room temperature and 102.6 MPa at 185°C. Copyright © 2007 John Wiley & Sons, Ltd.
Co-reporter:Jianjun Tian;Liqiang Wan;Jianzhi Huang;Yanhong Hu;Farong Huang;Lei Du
Journal of Applied Polymer Science 2007 Volume 106(Issue 3) pp:2111-2116
Publication Date(Web):23 JUL 2007
DOI:10.1002/app.26852
The curing behavior of a novel low temperature curing polytriazole resin, prepared from p-xylylene diazide and N,N,N′,N′-tetrapropargyl-p,p′-diaminodiphenylmethane, was investigated by DSC and rheological analyses. The kinetics of the curing of the resin was studied by nonisothermal and isothermal DSC measurements and the kinetics parameters were obtained. The values of apparent activation energy Ea of the curing reaction obtained by nonisothermal and isothermal DSC are 80.7 and 75.3 kJ/mol, respectively. The curing of the resin was traced by the isothermal rheological analysis. The gelation times of the resin at 70, 75, 80, and 85°C are about 200, 150, 110, and 75 min, respectively. The viscosity equation for the resin was found as follows: © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007
Co-reporter:Fan Wang;Jinfeng Xu;Jian Zhang;Farong Huang;Yongjia Shen;Lei Du
Polymer International 2006 Volume 55(Issue 9) pp:
Publication Date(Web):30 MAY 2006
DOI:10.1002/pi.2053
Two kinds of novel compounds, diphenylacetylene diphenyl ether (DPADPE) and diacetylene diphenyl ether (DADPE), were prepared and polymerized under heating. Raman, DSC and 13C CP/MAS NMR analyses were used for studying the polymerization reaction. DPADPE and DADPE have melting points at 190 and 79 °C, with exothermic peaks of the DSC curves at 375 and 215 °C for curing, respectively. Raman and 13C CP/MAS NMR spectra show that DPADPE could be cured at a temperature higher than 300 °C and DADPE at a lower temperature of higher than 150 °C. The kinetic parameters for the thermal crosslinking reactions were obtained by the Ozawa method and the results show that the apparent activation energy is 152 kJ mol−1 for DPADPE and 109 kJ mol−1 for DADPE. An ene–yne Straus product appears in the cured DADPE, whereas this product has not been identified in the cured DPADPE. The cured DPADPE and DADPE demonstrate good thermal and thermo-oxidative stability. Copyright © 2006 Society of Chemical Industry
Co-reporter:Yingqiang Zhang;Jianying Gao;Farong Huang;Xuening Shen
Journal of Applied Polymer Science 2006 Volume 99(Issue 4) pp:1705-1719
Publication Date(Web):6 DEC 2005
DOI:10.1002/app.22667
Several new bisbenzocyclobutene-terminated aromatic imides, 2,2′-bis(N-4-benzocyclobutenyl) phthalimide, 2,2′-bis[4-(N-4-benzocyclobutenylphthalimide)]-ether, 2,2′-bis[4-(N-4-benzocyclobutenylphthalimide)]-ketone, and 2,2′-bis[4-(N-4-benzo cyclobutenylphthalimid-4-oxy) phenyl]-propane, have been synthesized in high yields and characterized by FTIR, MS, EA, and 1H NMR spectroscopy. The polymers cured from benzocyclobutene-terminated imides have high glass transition temperature and good thermal stabilities. The cure reaction of an imide was studied by FTIR-ATR (attenuated total reflection) and DSC techniques. Apparent kinetic parameters of the cure reaction are obtained. The apparent cure reaction order, activation energy, and pre-exponential factor determined by isothermal DSC method are 1, 143.4 kJ/mol, and 3.88× 1013 min−1, and by nonisothermal DSC methods 1, 139.4 kJ/mol, and 2.27× 1013 min−1, respectively. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 99: 1705–1719, 2006
Co-reporter:Lian Xue, Liqiang Wan, Yanhong Hu, Xuening Shen, Farong Huang, Lei Du
Thermochimica Acta 2006 Volume 448(Issue 2) pp:147-153
Publication Date(Web):15 September 2006
DOI:10.1016/j.tca.2006.07.012
A novel poly(1,2,3-triazole) (PTA) resin was prepared from a diazide and a multialkyne. The thermal stability and degradation kinetics of the cured PTA resin were investigated with the aid of the thermogravimetric analysis (TGA) technique. The degradation temperature of the cured PTA resin reaches 360 °C (Td5). Apparent kinetic parameters of the degradation of the cured resin is obtained by using Ozawa's method. The average apparent degradation activation energies of the PTA resin are about 190 kJ/mol under nitrogen and 160 kJ/mol under air. The cured PTA resin was pyrolyzed at 400 and 570 °C separately and the pyrolysis fragments were determined by using the Py/GC/MS combined technique. The results show that the degradation of the cured PTA resin initiates at CH2N bonds. Nitrogen and related compounds which result from the cleavage of CN and NN bonds of 1,2,3-triazole ring were found in the pyrolysis products at 570 °C but no at 400 °C. Finally, a degradation mechanism of the cured polytriazole resin was proposed.
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