端氯基聚苯乙烯在丁基橡胶合成中的应用  

Effect of chloro-terminated polystyrene on synthesizing butyl rubber

作　　者：蓝林立[1] 伍一波[1] 宋改云[1] 李树新[2] 郭文莉[2] 

机构地区：[1]北京化工大学材料科学与工程学院,北京100029 [2]北京石油化工学院材料与化工系,北京102617

出　　处：《合成橡胶工业》2004年第6期341-343,共3页China Synthetic Rubber Industry

摘　　要：采用自由基聚合技术 ,以苯乙烯为单体 ,偶氮二异丁腈为引发剂 ,在四氯化碳存在下 ,于60℃ ,2 4h合成了端氯基聚苯乙烯。采用正离子聚合工艺 ,以异丁烯、异戊二烯为单体 ,AlCl3 /H2 O为引发体系 ,引发反应前加入端氯基聚苯乙烯 ,在一氯甲烷溶剂中于 -80℃ ,0 5h下合成了丁基橡胶。结果表明 ,当端氯基聚苯乙烯质量分数为 1 0 %～ 1 5 %时 ,可以起到稳定丁基橡胶淤浆的作用。随着端氯基聚苯乙烯质量分数增加 ,丁基橡胶的相对分子质量有一最大值 ,而单体转化率略有上升。Chloro-terminated polystyrene(Cl-PS) was prepared by free radical polymerization with styrene as monomer, azobisisobutyronitrile as initiator, in the presence of CCl 4 at 60 ℃,24 h. Butyl rubber was synthesized by cationic polymerization with isobutylene and isoprene as monomers, AlCl 3 as the co-initiator, Cl-PS as slurry stabilizer, in diluent of methyl chloride. The effects of Cl-PS on the slurry-stabilization in the process of synthesizing butyl rubber and relative molecular mass of products were studied. The results showed that Cl-PS could certainly stabilize the slurry of butyl rubber. At the same time, with the increase of mass fraction of Cl-PS, the relative molecular mass of product increased firstly then decreased,the conversion increased a little.

关 键 词：丁基橡胶 正离子聚合 端氯基聚苯乙烯 稳定性 相对分子质量 

分 类 号：TQ333.6[化学工程—橡胶工业]