摘要
本文用二种双官能团引发剂进行基团转移嵌段共聚研究，得到了一系列实测分子量和理论分子量相近、分子量分布较窄的Ａ－Ｂ－Ａ型嵌段共聚物。用ＧＰＣ、＾１Ｈ－ＮＭＲ、ＤＳＣ等手段对嵌段共聚物进行了表征，证明确是两相嵌段共聚丙烯酸酯。发现位阻较大的单体作为第二单体时不利于聚合。过高的催化剂用量使嵌段共聚的总转化率降低。使用极性较大的溶剂可缩短第一步聚合的诱导期，但不影响第二步聚合的诱导期，即极性较大的溶剂有…
It was reported the group transfer block copolymerization of methacrylates and arylates with bifunctional initiators and bibenzoate catalyst. ABA-triblock copolymers of MMA and BA, MMA and BMA, MMA and EMA with predetermined molecular weight and low poly-dispersity were obtained. The copolymers were characterized by 1H-NMR, GPC and DSC. The effects of the block sequence, catalyst concentration, solvent polarity on block copolymerization were studied.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
1993年第5期521-528,共8页
Acta Polymerica Sinica
基金
国家自然科学基金
关键词
基团转移聚合
聚丙烯酸酯
引发剂
Group transfer polymerization, Block copolymerization, Polymethacrylates, Polyacrylates, Bifunctional initiator
