耐氧化含碳硼烷乙烯基硅芳炔树脂的结构和性能

Structures and Properties of Oxidation Resistant Carborane Grafted Poly(vinylsilylene ethynylenephenyleneethynylene) Resin

摘要: 合成了二甲基亚硅基苯基碳硼烷（SP-CB），并通过硅氢加成反应将其接枝到硅芳炔树脂上，得到了一种新型的含碳硼烷乙烯基硅芳炔树脂（CB-g-PVSA）。通过核磁共振、红外、热分析等手段表征了其结构和性能。结果表明,合成的CB-g-PVSA具有良好的加工性能，其固化物具有优良的热氧化稳定性，在空气中失重5%时的热分解温度（Td5）为602 ℃，800 ℃下的质量保留率为92.6％。

Abstract: 1-Dimethylsiyl-2-phenyl 1,2-dicarba dodecaborane was synthesized and grafted into poly(vinylsilylene ethynylenephenyleneethynylene) through the hydrosilylation addition.A new carborane-g-poly(vinylsilylene ethynylenephenylenethynylene)(CB-g-PVSA) was obtained. The grafting and structures of the polymer were characterized by 1H-NMR. The curing behavior of CB-g-PVSA was traced by Differential Scanning Calorimetry(DSC). The CB-g-PVSA resin showed good processability and the crosslinked CB-g-PVSA thermoset showed excellent thermal oxidative stability based on thermogravimetric analysis. The decomposition temperature of 5% mass loss(Td5) and the mass residual of the crosslinked thermoset at 800 ℃ under air were 602 ℃ and 92.6%, respectively.