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首页> 外文会议>International Conference on Modification, Degradation and Stabilization of Polymers(MoDeSt 2002); 2002; Budapest; HU >Synthesis and Properties of Poly(m-carborane-siloxane) Elastomers
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Synthesis and Properties of Poly(m-carborane-siloxane) Elastomers

机译：聚间甲撑硅氧烷弹性体的合成与性能

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摘要

Organic boron polymers are of interest to AWE, and a significant improvement would be to make components from a single phase material that enables the boron content to be maximised and the elastomeric properties to be tuned to requirement. This paper is a summary of the work carried out towards the synthesis and characterisation of poly(m-carborane-siloxane) rubbers. These rubbers have been synthesised by the Ferric Chloride-catalysed condensation reaction between dimethoxy-m-carborane terminated monomer and dichlorodimethylsilane. Phenyl modified and Phenyl-vinyl modified variations have been synthesised in addition to the unmodified poly(m-carborane-siloxane) polymers. The unmodified poly(m-carborane-siloxane) shows some crystallinity but the modified versions are amorphous and have good elastomeric properties. Overall, the measured boron content is in close agreement to that expected from the repeat unit, suggesting the synthesised rubbers have been successfully prepared. It is also demonstrated that the carborane unit offers increased thermal stability and retention of 'rubber-like' properties even after ageing at high temperature.
机译：有机硼聚合物是AWE的兴趣所在，并且一项重大改进将是使单相材料制成的组件能够使硼含量最大化，并使弹性体性能达到要求。本文总结了聚（间-碳烷-硅氧烷）橡胶的合成和表征工作。这些橡胶是通过二甲氧基-间-甲撑烷封端的单体与二氯二甲基硅烷之间的氯化铁催化的缩合反应合成的。除了未改性的聚（间-碳烷-硅氧烷）聚合物以外，还合成了苯基改性的和苯基乙烯基改性的变体。未改性的聚（间-碳氢化合物-硅氧烷）表现出一定的结晶度，但改性形式为无定形且具有良好的弹性。总体而言，测得的硼含量与重复单元的预期值非常一致，表明合成橡胶已成功制备。还证明了即使在高温下老化之后，碳硼烷单元也提供了提高的热稳定性和“橡胶样”性能的保留。

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