An ester type polymeric peroxide has a peroxide group of the formula (I):
a group of the formula (I′)
and a group of the formula (II)
wherein X stands for one member selected from the group consisting of -CH₂-CH₂-, -C≡C- and
continuously bound such that I and I′ occur randomly in alternation with II, having a (I) : (I′) molar ratio in the range of from 9 : 1 to 1 : 9 and the [(I) + (I′)] : (II) molar ratio in the range of from 6 : 4 to 4 : 6, and having an average molecular weight in the range of from 1,000 to 20,000, a polyerization initiator for vinyl type monomer comprising said ester type polymeric peroxide and method for the production of a block copolymer of vinyl type monomer by said polymerization initiator.
酯类聚合过
氧化物具有式 (I) 的过
氧化物基团:
式(I′)的基团
和一个式(II)的基团
其中 X 代表选自-CH₂-CH₂-、-C≡C-和-C≡C-的一个成员。
连续结合,使 I 和 I′ 与 II 随机交替出现,(I) : (I′) 摩尔比在 9 : 1 到 1 : 9 之间,[(I) + (I′)] : (II) 摩尔比在 6 : 4 到 4 :(II) 摩尔比在 6 : 4 至 4 : 6 之间,且平均分子量在 1,000 至 20,000 之间;一种
乙烯基型单体的聚合
引发剂,包含上述
酯类聚合过
氧化物;以及用上述聚合
引发剂生产
乙烯基型单体嵌段共聚物的方法。