The invention discloses a method for preparing a triblock copolymer of the formula:
1
comprising:
(a) contacting a cycloalkene with a chain transfer agent of the formula:
Z—Y═Y—Z
in the presence of a metal carbene metathesis catalyst to form a telechelic polymer; and
(d) contacting the telechelic polymer with an alkene of the formula
2
in the presence of an ATRP organometallic catalyst
wherein n and m are integers; Z is an ATRP initiator and —Y═Y— is an alkenyl group; and, R′ is selected from the group consisting of aryl, nitrile and C
1
-C
20
carboxylate, wherein R′ is substituted or unsubstituted. The invention also discloses a method for preparing a diblock copolymer. In addition, the invention encompasses a triblock copolymer having no 1,2-PBD structure in the PBD portion of the copolymer.
本发明公开了一种制备式三嵌段共聚物的方法:
1
包括
(a) 将环烯与式中的链转移剂接触:
Z-Y═Y-Z
(b) 在
金属碳烯偏析催化剂存在下,使环链烯与式 Z-Y═Y-Z 的链转移剂接触,形成远志聚合物;及
(d) 将该远chelic 聚合物与式:Z-Y═Y-Z 的烯烃接触
2
(d) 在 ATRP 有机
金属催化剂存在下,将远链聚合物与式 2 的烯烃接触
其中 n 和 m 为整数;Z 为 ATRP 起始剂和-Y═Y- 为烯基;R′ 选自芳基、腈基和 C
1
-C
20
羧酸盐组成的组,其中R′是取代或未取代的。本发明还公开了一种制备二嵌段共聚物的方法。此外,本发明还包括一种在共聚物的
PBD 部分没有 1,2-PBD 结构的三嵌段共聚物。