乙烯基封端氟硅共聚物的制备及其橡胶性能的研究

Study on preparation of vinyl-terminated poly(methyltrifluoropropyl-dimethyl)siloxane and properties of its rubber

合成了不同氟硅含量的乙烯基封端γ-三氟丙基甲基硅氧烷-二甲基硅氧烷共聚物,并以此为主体材料制备了氟硅混炼橡胶,研究了其力学、耐油以及低温等各种性能。实验结果表明,该类橡胶有较好的耐油性能和优异的低温性能。而且随着聚合物主链中氟硅氧烷链节的增加,橡胶的耐油性能随之提高;同时,DMTA数据表明,随着聚合物主链中二甲基硅氧烷链节的增加,橡胶低温性能随之提高。这一系列氟硅橡胶的研究为制备在不同环境下使用的硅橡胶材料提供了参考依据。

A series of vinyl-terminated poly（methyltrifluoropropyl-dimethyl）siloxane were synthesized,then the mixing fluorosilicone rubber was prepared with it used main material.It was found that both oil-resistant properties could be influenced by fluorosilicone content and low-temperature performance could be improved by introduction of dimethyl siloxanes.