4-叔丁氧基苯乙烯-苯乙烯共聚物的合成  

Synthesis of 4-tert-butoxystyrene-styrene copolymer

作　　者：吕航 赵忠夫[1] 王茧桦 韩春影 张春庆[1] LüHang;Zhao Zhongfu;Wang Jianhua;Han Chunying;Zhang Chunqing(School of Chemical Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学化工学院,辽宁大连116024

出　　处：《合成树脂及塑料》2023年第6期7-10,25,共5页China Synthetic Resin and Plastics

基　　金：国家自然科学基金资助项目(51673034);中央高校基本科研业务费资助项目(DUT20ZD215)。

摘　　要：采用活性阴离子聚合方法,以四氢呋喃(THF)/环己烷(CYX)为溶剂、正丁基锂为引发剂,苯乙烯与4-叔丁氧基苯乙烯为单体合成4-叔丁氧基苯乙烯-苯乙烯共聚物,并表征了其结构与性能。结果表明:-78℃,THF为溶剂时,4-叔丁氧基苯乙烯-苯乙烯共聚物相对分子质量分布指数(PDI)为1.23,共聚过程中4-叔丁氧基苯乙烯活性高于苯乙烯;m(THF)∶m(CYX)=5∶5的THF/CYX为溶剂,-30℃下所得4-叔丁氧基苯乙烯-苯乙烯共聚物的PDI为1.10,相对分子质量分布更窄且有利于降低聚合成本;4-叔丁氧基苯乙烯-苯乙烯共聚物的玻璃化转变温度(tg)均低于4-叔丁氧基苯乙烯均聚物,4-叔丁氧基苯乙烯含量越高,4-叔丁氧基苯乙烯-苯乙烯共聚物的tg越高。The 4-tert-butoxystyrene-styrene copolymer was prepared via living anionic polymerization with tetrahydrofuran(THF)/cyclohexane(CYX)as solvent,n-BuLi as initiator,styrene and 4-tert-butoxystyrene as monomers,whose structure and performance were characterized.The results show that the molecular mass distribution index(PDI)of 4-tert-butoxystyrene-styrene copolymer obtained at-78℃and THF as solvent is 1.23.The activity of 4-tert-butoxystyrene is higher than that of styrene during the copolymerization process.The PDI of the 4-tert-butoxystyrene-styrene copolymer is 1.10 at-30℃when the mass ratio of THF and CYX is 5∶5.The molecular mass distribution of copolymer is narrower and polymerization costs is reduced.The glass transition temperature(tg)of the 4-tert-butoxystyrene-styrene copolymer is lower than that of the 4-tertbutoxystyrene homopolymer.The higher the 4-tert-butoxystyrene content is,the higher the tg of the 4-tertbutoxystyrene-styrene copolymer is.

关 键 词：阴离子聚合 苯乙烯 4-叔丁氧基苯乙烯 二元共聚合 

分 类 号：TQ334.3[化学工程—橡胶工业]