阴离子聚合制备聚苯乙烯-聚异戊二烯-聚甲基丙烯酸甲酯三嵌段共聚物  

Preparation of polystyrene-polyisoprene-polymethyl methacrylate by anionic polymerization

作　　者：吴迪[1] 陈二中 刘歌[1] 刘晓杰 燕晓宇 魏峰[1] WU Di;CHEN Erzhong;LIU Ge;LIU Xiaojie;YAN Xiaoyu;WEI Feng(Shenyang Research Institute of Chemical Industry Co.,Ltd.,Shenyang 110021,China)

机构地区：[1]沈阳化工研究院有限公司,辽宁沈阳110021

出　　处：《弹性体》2020年第2期46-50,共5页China Elastomerics

基　　金：沈阳市“双百工程”科技计划重大科技研发项目(280010000037)。

摘　　要：以正丁基锂为引发剂,环己烷、四氢呋喃为溶剂,制备了聚苯乙烯(PS)-聚异戊二烯(PI)-聚甲基丙烯酸甲酯(PMMA)三嵌段共聚物。通过凝胶渗透色谱(GPC)、核磁氢谱对产物进行表征,并分析了甲基丙烯酸甲酯(MMA)用量及其相对分子质量对聚合物玻璃化转变温度(Tg)的影响。结果表明,合成了相对分子质量分布窄的三嵌段聚合物,随着MMA用量增加,Tg稍有上升,随着三嵌段聚合物相对分子质量增加,Tg明显增加。Polystyrene-b-polyisoprene-b-polymethyl methacrylate triblock copolymer was prepared by using n-butyllithium as initiator,cyclohexane and tetrahydrofuran as solvents.The structure was characterized by GPC and NMR.The influence of dosage of methyl methacrylate and molecular weight on Tg was analyzed.The results showed that the triblock polymer having a narrow molecular weight distribution was synthesized.As the content of methyl methacrylate increased,the Tg increased.As the molecular weight increased,the Tg showed a significant increase.

关 键 词：阴离子聚合 玻璃化转变温度 极性单体 

分 类 号：TQ325.2[化学工程—合成树脂塑料工业]