溴化丁基橡胶的热可逆共价交联

李岩　 高闪　 陈锦　 何少剑　 陈晓农　 焦书科　

摘　要：利用季铵化反应的热可逆特性,采用含有叔胺官能团的聚合物替代传统交联剂,研究了溴化丁基橡胶(BIIR)的交联反应活性及交联的热可逆性.结果表明,硫化温度和硫化时间对交联BIIR的凝胶含量有显著影响,在160 ℃×30 min的硫化条件下,交联剂呈现出较高的交联活性;不同温度下的转矩测定和190 ℃二次热压的塑性流动证实交联BIIR具备热塑加工性.
关键词：季铵化反应;热可逆共价交联;溴化丁基橡胶
分类号：TQ333.6 　文献标识码：B
文章编号：1000-1255(2009)04-0302-04

Thermoreversible covalent crosslinking of brominated butyl rubber

Li Yan（College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China）　 Gao Shan（College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China）　 Chen Jin（College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China）　 He Shaojian（College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China;Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials,Beijing University of Chemical Technology,Beijing 100029,China）　 Chen Xiaonong（College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China;Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials,Beijing University of Chemical Technology,Beijing 100029,China）　 Jiao Shuke（College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China）　

Abstract：Crosslinking activity and thermal reversibility of brominated butyl rubber (BIIR) were investigated using tertiary amine-containing polymer as crosslinker. Such a crosslinker provIDed covalent linkages between rubber polymer chains via quaternarization which was thermoreversible. The results showed that the gel content of BIIR was affected strongly by vulcanization temperature and time, and under the crosslinking condition 160℃×30 min, the higher crosslinking activity of the crosslinker was exhbitied.The torque measurement at different temperature and thermal recompression indicated that the crosslinking BIIR had good thermal induced flowability and thermal reprocessing ability at 190 ℃.
Keywords：quaternarization; thermoreversible covalent crosslinking; brominated butyl rubber