L,L-lactide and ε-caprolactone block copolymers by a 'poly(L,L-lactide) block first' route

被引：52

作者：

Florczak, Marcin ^{[1
]}

Libiszowski, Jan ^{[1
]}

Mosnacek, Jaroslav ^{[1
]}

Duda, Andrzej ^{[1
]}

Penczek, Stanislaw ^{[1
]}

机构：

[1] Polish Acad Sci, Inst Polymer, Ctr Excellence Degrada Biopolymers, Sienkiewicza 112, PL-90363 Lodz, Poland

来源：

MACROMOLECULAR RAPID COMMUNICATIONS | 2007年 / 28卷 / 13期

关键词：

aluminum alkoxide; epsilon-caprolactone; block copolymers; L; L-lactide; living polymerization; ring-opening polymerization; transesterification;

D O I：

10.1002/marc.200700160

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

L,L-lactide (LA) and epsilon-caprolactone (CL) block copolymers have been prepared by initiating the poly (epsilon-caprolactone) (PCL) block growth with living poly(L,L-lactide) (PLA*). In the previous attempts to prepare block copolymers this way only random copolyesters were obtained because the PLA* + CL cross-propagation rate was lower than that of the PLA-CL* + PLA transesterification. The present paper shows that application of Al-alkoxide active centers that bear bulky diphenolate ligands results in efficient suppression of the transesterification. Thus, the corresponding well-defined di- and triblock copolymers could be prepared.

引用

页码：1385 / 1391

页数：7

共 64 条

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