GROUP TRANSFER BLOCK COPOLYMERIZATION BY BIFUNCTIONAL INITIATORS

ZOU You-si; LIN Jian-jun; PAN Rong-hua

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GROUP TRANSFER BLOCK COPOLYMERIZATION BY BIFUNCTIONAL INITIATORS

Research Article | 更新时间：2021-03-19

- GROUP TRANSFER BLOCK COPOLYMERIZATION BY BIFUNCTIONAL INITIATORS
- Acta Polymerica Sinica Issue 5, Pages: 521-528(1993)
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- Published：20 October 1993，
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ZOU You-si, LIN Jian-jun, PAN Rong-hua. GROUP TRANSFER BLOCK COPOLYMERIZATION BY BIFUNCTIONAL INITIATORS. [J]. Acta Polymerica Sinica (5):521-528(1993)
DOI：

ZOU You-si, LIN Jian-jun, PAN Rong-hua. GROUP TRANSFER BLOCK COPOLYMERIZATION BY BIFUNCTIONAL INITIATORS. [J]. Acta Polymerica Sinica (5):521-528(1993) DOI：

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利于催化剂的离解。单体浓度增大使共聚物的分子量减小

多分散性指数增大。可通过单体投料比改变共聚物的热形变温度。

Abstract

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.

关键词

基团转移聚合嵌段共聚聚甲基丙烯酸酯聚丙烯酸酯双官能团引发剂

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