中文摘要：

为研究聚乙烯基三苯乙炔基硅烷树脂的热性能,以苯乙炔和乙烯基三氯硅烷为原料,运用格利雅反应合成了乙烯基三苯乙炔基硅烷单体,并通过红外(FT-IR)、核磁(1H-NMR,13C-NMR,29Si-NMR)证实了合成产物.以此单体为原料,通过热聚合法制备了聚乙烯基三苯乙炔基硅烷树脂,并采用TGA-DTG研究该聚合物的热分解动力学,计算了相应动力学参数.结果表明:该树脂的热分解温度(Td5%)在550℃左右,800℃时聚合物的残炭率约80%;用Kissinger法和Ozawa法求得的聚合物热分解活化能分别为266.55和236.89 k J/mol;用Crane法求得聚合物的热分解反应级数为0.93,近似为一级反应.

英文摘要：

To investigate the thermal properties of poly ( vinyltri ( phenylethynyl ) silane ) s ( PVTPES ) , vinyltri (phenylethynyl)silane (( Ph C?C )3-Si-CH?CH2 )(VTPES)was synthesized with vinyltrichlorosilane and phenylethynyl by Grignard reaction. Fourier transform infrared ( FT-IR ) and nuclear magnetic resonance (1H-NMR, 13C-NMR, 29Si-NMR) were used to characterize the molecular structure. Polymer of poly (vinyltri( phenylethynyl) silane) s was prepared by thermal polymerization of VTPES monomer and further characterized by TGA-DTG to get the corresponding thermal decomposition kinetic parameters. The results showed that the decomposition temperature at 5% weight loss ( Td5%) of the resin was about 550℃, and char yield (800 ℃) was approximately 80%. The Ea were 266.55 kJ/mol and 236.89 kJ/mol by Kissinger and Ozawa methods, respectively;the reaction order was 0.93 by Crane equation suggesting that the decomposition reaction was the first order reaction.