聚(苯乙烯-co-丙烯腈)-b-聚苯乙烯两嵌段共聚物的合成

Studies on preparation of PS-B-P(St-co-AN) two-block copolymer

以CuBr/N,N,N′,N′,N′ 五甲基二亚乙基三胺(简称NNN)为催化体系,研究了原子转移自由基聚合法(ATRP)PS b P(S co AN)两嵌段聚合物的合成。研究了聚合顺序对相对分子质量及其分布和嵌段效率的影响,并且用聚合物末端C—Br键的断裂能对实验结果进行了初步解释。

The preparation of PS-B-P(St-co-AN) two-block copolymer obtained by atomic transformation radical polymerization(ATRP) under the catalyst system of CuBr/NNN was studied in this paper,including the effect of feeding sequence on molecular weight,molecular weight distribution and block efficiency.The result was interpreted by the breaking energy of C-Br at the end of the molecular chain.