聚苯乙烯-聚甲基丙烯酸缩水甘油酯嵌段共聚物的合成与表征  

Synthesis and Characterization of Polystyrene-b-Poly(Glycidyl Methacrylate) Copolymer

作　　者：何晓燕[1] 张健[1] 黄辉[1] 危大福[1] 郑安呐[1] 

机构地区：[1]华东理工大学材料科学与工程学院,上海200237

出　　处：《功能高分子学报》2009年第2期173-177,212,共6页Journal of Functional Polymers

基　　金：国家自然科学基金(50390090)

摘　　要：在常压、惰性气体保护下,以正丁基锂引发苯乙烯进行阴离子聚合,并用少量甲基丙烯酸缩水甘油酯(GMA)进行终端共聚,制得了侧基含有环氧基团的聚苯乙烯-聚甲基丙烯酸缩水甘油酯嵌段共聚物。用GPC、FT-IR1、H-NMR及盐酸-二氧六环银量法对共聚物进行了分析,并考察了GMA用量、终端共聚的反应温度及时间对环氧侧基数量的影响。结果表明:在少量四氢呋喃和氯化锂的存在下,1,1-二苯基乙烯(DPE)"盖帽"的聚苯乙烯阴离子活性种在甲苯溶剂中可引发GMA单体聚合反应,所得聚合物分子链中环氧侧基数量可根据需要进行调节。适宜的终端共聚反应温度和时间分别为-65℃和0.5 min。The living poly（styryl）lithium was synthesized by anionic polymerization under argon atmosphere. Polystyrene-b-poly（glycidyl methacrylate） copolymers were prepared by the copolymerization reaction of poly（styryl）lithium with glycidyl methacrylate （GMA）,which were characterized with GPC, FTIR, 1H-NMR and hydrochloric acid-dioxane argentimetric method. Effects of GMA dosage, copolymerization duration and temperature on the number of side epoxy group were also studied. Results show that poly（styryl）lithium endcapped with 1,1-diphenylethylene （DPE） can initiate GMA in toluene in the presence of LiCl and a small amount of THF, and the number of side epoxy group can be adjusted. The optimal reaction temperature is -65 ℃ and the best termination time is 0.5 min.

关 键 词：甲基丙烯酸缩水甘油酯 环氧基团 聚苯乙烯 阴离子聚合 

分 类 号：TQ316.32[化学工程—高聚物工业]