Amphiphilic biodegradable poly(CL-b-PEG-b-CL) triblock copolymers prepared by novel rare earth complex:: Synthesis and crystallization properties

被引：53

作者：

Zhu, Weipu ^{[1
]}

Xie, Weihui ^{[1
]}

Tong, Xiaowei ^{[1
]}

Shen, Zhiquan ^{[1
]}

机构：

[1] Zhejiang Univ, Minist Educ, Inst Polymer Sci, Key Lab Macromol Synth & Functionalizat, Hangzhou 310027, Peoples R China

来源：

EUROPEAN POLYMER JOURNAL | 2007年 / 43卷 / 08期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

block copolymer; isothermal crystallization; poly(epsilon-caprolactone); poly(ethylene glycol); rare earth catalyst;

D O I：

10.1016/j.eurpolymj.2007.04.024

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Amphiphilic biodegradable poly(CL-b-PEG-b-CL) triblock copolymers have been successfully prepared by the ring-opening polymerization of epsilon-caprolactone (CL) employing yttrium tris(2,6-di-tert-butyl-4-methylphenolate) [Y(DBMP)(3)] as catalyst and double-hydroxyl capped PEGs (DHPEG) as macro-initiator. The triblock architecture, molecular weight, thermal and crystallization properties of the copolymers were characterized by NMR spectra, SEC, DSC and WAXD analyses. The isothermal crystallization behavior of the copolymers was investigated by POM analysis in detail, which is greatly influenced by the length of PCL and PEG blocks. On the POM micrograph of PEG(10,000)-(PCL8600)(2), a unique morphology of concentric spherulites was observed due to the sequent crystallization of the PCL and PEG blocks. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：3522 / 3530

页数：9

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