聚丙烯酸叔丁酯的可控合成

Controlled Synthesis of Poly(tert-Butyl Acrylate)

以偶氮二异丁腈(AIBN)为引发剂,1-苯乙基二硫代苯乙酸酯(PEPDTA)为RAFT试剂,在乙酸乙酯中实施了丙烯酸叔丁酯(tBA)的RAFT自由基聚合。分子量测试表明,在高转化率(93%)下P(tBA)的分子量分布指数(Mw/Mn)小于1.1,且数均分子量与转化率成良好的线性关系,体现了可控/"活性"聚合的特征。

Reversible addition-fragmentation chain transfer（RAFT） radical polymerization of tert-butyl acrylate（tBA） are carried out in ethyl acetate at 70℃,using AIBN as the initiator and 1-phenylethyl phenyldithioacetate（PEPDTA） as the RAFT reagent.The GPC results show that there is a linear relationship between the number average molecular weight of poly（tert-butyl acrylate）（P（tBA）） and the conversion.The polydispersity index（PDI） of P（tBA） are less than 1.1 with the yields more than 93%,indicating the controlled /＂living＂ polymerization.