文献类型：期刊文献

英文题名：Preparation and properties of a new silicon-polytriazole resin and its composite

作者：Guo, Bing[1]; Wan, Liqiang[1]; Du, Lei[1]; Huang, Farong[1]

机构：[1] Key Laboratory for Specially Functional Polymeric Materials and Related Technology, East China University of Science and Technology, 130 Meilong road, Shanghai, China

年份：2015

卷号：2015-July

外文期刊名：ICCM International Conferences on Composite Materials

收录：EI(收录号：20183705813679)

语种：英文

摘要：Polytriazole (PTA) resins are prepared from azide and alkyne through Huisgen 1,3-dipolar cycloaddition. The PTA resins can be cured at low temperature and possess excellent performances, such as good heat resistance and high mechanical properties. Silicon-containing arylacetylene is a promising monomer for polytriazole resin, as there are lots of arylacetylenes in its backbone which can provide the high crosslinking density and rigid molecular chain. In order to improve the processability, low molecular weight silicon-containing arylacetylene (LPSA) was designed and synthesized from diethynylbenzene and dimethyldichlorosilane by Grignard method. The LPSA was characterized by1H-NMR and FT-IR. The results show that the degree of polymerization(DP) value of LPSA is ranged from 1.60 to 1.80. A new silicon-polytriazole (Si-PTA) resin was synthesized from 4,4'-diazidomethyl biphenyl(DAMBP) and LPSA via 1,3-dipolar cycloaddition. The Si-PTA resin was characterized by1H-NMR, FT-IR, differential scanning calorimetry (DSC). The results show that the resin could be cured at 80℃. The dynamic thermomechanical analysis(DMA) results show that the glass transition temperature(Tg) of the cured Si-PTA resin is 310℃ after curing 80℃ for 12 h, 150℃for 2 h, 180℃ for 2 h, 210℃for 2 h, and 250℃ for 2 h. Thermogravimetric analysis (TGA) results show that the thermal decomposition temperature(Td5, temperature at 5% weight loss) under N2 and air could reached 342 ℃ and 340 ℃, respectively. Unidirectional T700 carbon fiber reinforced Si-PTA composite (Si-PTA/T700) was prepared through compression molding. The structures and properties of the composite were characterized by mechanical property tests, DMA, etc. The results show that the Si-PTA composite exhibited good mechanical and thermal properties, the flexural strength is 1678 MPa at room temperature and 1095 Mpa at 200 ℃. ? 2015 International Committee on Composite Materials. All rights reserved.