Fast and Controlled Ring-Opening Polymerization of Cyclic Esters by Alkoxides and Cyclic Amides

被引：32
|
作者：
Tan, Chen [1 ]
Xiong, Shuoyan [1 ]
Chen, Changle [1 ]
机构：
[1] Univ Sci & Technol China, Dept Polymer Sci & Engn, CAS Key Lab Soft Matter Chem, iChEM Collaborat Innovat Ctr Chem Energy Mat, Hefei 230026, Anhui, Peoples R China
来源：
MACROMOLECULES | 2018年 / 51卷 / 05期
基金：
中国国家自然科学基金;
关键词：
EQUILIBRIUM ACIDITIES; ZWITTERIONIC POLYMERIZATION; LIVING POLYMERIZATION; LACTIDE; CATALYSIS; ORGANOCATALYSIS; POLY(LACTIDE); COMPLEXES; MECHANISM; POLYMERS;
D O I：
10.1021/acs.macromol.7b02697
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Ring-opening polymerization is a powerful method for the synthesis of biodegradable and biorenewable polyesters. In this contribution, we report that the combination of alkali alkoxides and commercially available cyclic amides catalyzes fast and controlled ring-opening polymerization of L-lactide. The constrained cis C=N bond in the imidate catalyst is critical for achieving high catalytic activity. By optimizing the basicity of the catalyst, a good balance between activity and control (M-w/M-n < 1.1) is realized. A high amide/initiator ratio is essential for producing narrow dispersities and inhibiting transesterification.
引用
收藏
页码：2048 / 2053
页数：6
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