溴化工艺对溴化丁基橡胶凝胶质量分数的影响

摘要

Gel content has a certain impact on the immanent quality of rubber products and processing performance. Therefore,it is crucial for brominated butyl rubber to control the gel content.Brominated butyl rubber (BIIR)was prepared by solution method and the effect of the brominated process such as bromination temperature,additives,bromination time and bromide agent on the gel content of BIIR was investigated.The results show that the appropriate reaction temperature is conducive to the control of the gel content.Gel content will increase with the increasing of the concentration of time and bromide agent.The additives can lower the gel content.%橡胶中凝胶含量影响橡胶制品的内在质量和加工性能。因此,如何控制凝胶含量对溴化丁基橡胶的生产至关重要。采用溶液法合成溴化丁基橡胶(BIIR),研究了溴化工艺条件如溴化温度、添加剂、溴化时间及溴化剂质量分数等对 BIIR 凝胶质量分数的影响。结果表明,溴化反应温度50℃左右有利于 BIIR 凝胶质量分数的控制；凝胶质量分数会随溴化时间及溴化剂质量分数的增加而增大,控制溴化时间在1~2 min,液溴质量分数应控制在13.5%~14.0%为宜；抗氧剂的加入可使凝胶质量分数降低,抗氧剂质量分数为0.2%左右为宜。