以β-CPDN为链转移剂的苯乙烯RAFT聚合  

RAFT POLYMERIZATION OF STYRENE USING 2-CYANOPROP-2-YL β-DITHIONAPHTHALATE AS CHAIN TRANSFER AGENT

作　　者：周弟[1] 朱秀林[1] 朱健[1] 程振平[1] 

机构地区：[1]苏州大学化学化工学院,江苏苏州215006

出　　处：《高分子材料科学与工程》2005年第6期91-94,共4页Polymer Materials Science & Engineering

基　　金：江苏省高新技术项目(BG2004018);苏州市科技发展计划(SG0413)

摘　　要：以二硫代β-萘甲酸异丁腈酯(-βCPDN)为链转移剂,研究了偶氮二异丁腈(A IBN)引发和热引发条件下的苯乙烯(S t)RAFT聚合,结果显示:聚合动力学虽然未呈现一级线性关系,但所得聚合物的分子量(M-n)随单体转化率升高而线性增大,与理论值(M-n,th)较吻合,分子量分布指数(PD I)维持在较低值(<1.3)。同时考察了配比以及聚合温度对聚合可控性的影响,发现A IBN引发时,[-βCPDN]0/[A IBN]0值为2至3时聚合的可控性较好,热引发时聚合温度采用100℃,聚合的控制性最佳。The reversible addition-fragmentation chain transfer （RAFT） polymerizations of styrene in bulk using 2-cyanoprop-2-yl β-dithionaphthalate （β-CPDN） as chain transfer agent and with or without AIBN initiated have been studied. The results show that styrene can be polymer- ized in a controlled way by RAFT process using β-CPDN as chain transfer agent. The molecular weights （J~/n） of the polymer increase linearly with monomer conversions and are closed to the theoretical values （Mn.,h） ~ At the same time molecular weight distributions （^-Mw/^-Mn） of the polymer are remained in the relatively low values （lower than 1.3）. The suitable malor ratio between [β-CPDN]0 and [AIBN]0 was confirmed to be 2 to 3 when using AIBN initiating the polymerizations. The controllability of polymerization is the best at 100℃ when thermal initiated the polymerizations.

关 键 词：可逆加成-断裂链转移 二硫代β-萘甲酸异丁腈酯 苯乙烯 

分 类 号：TQ316.322[化学工程—高聚物工业]