新型聚苯醚-聚硅氧烷嵌段共聚物(英文)

Novel polyphenylene ether-polysiloxane block copolymer

聚苯醚是一种以其优异的耐水性、尺寸稳定性和固有阻燃性而著称的工程热塑性塑料。通过2,6-二甲酚和丁子香酚-封端的聚硅氧烷的氧化偶联聚合制备了聚苯醚-聚硅氧烷的三嵌段共聚物。这种生产共聚物的方法比现有技术的通过连接预先形成的聚苯醚和聚硅氧烷嵌段而制备相关共聚物的方法简单。本文描述了该共聚物的结构,以及与聚苯醚均聚物相比,该共聚物在关键性质例如抗冲性、阻燃性和生烟性方面的改进。

Polyphenylene ether is an engineering thermoplastic known for its excellent water resistance,dimensional stability and inherent flame retardancy. A triblock copolymer of polyphenylene ether-polysiloxane is produced by the oxidative coupling polymerization of 2,6-xylenol and eugenol-capped polysiloxane. This method of producing the copolymer is simpler than prior methods of preparing related copolymers by linking preformed polyphenylene ether and polysiloxane blocks. This paper describes the copolymer structure and the significant improvements in key properties such as impact resistance,flame retardancy and smoke generation obtained with the copolymer as compared to the polyphenylene ether homopolymer.