Simple sodium and potassium phenolates as catalysts for highly isoselective polymerization of rac-lactide

被引：59

作者：

Dai, Zhongran ^{[1
]}

Sun, Yangyang ^{[1
]}

Xiong, Jiao ^{[1
]}

Pan, Xiaobo ^{[1
]}

Tang, Ning ^{[1
]}

Wu, Jincai ^{[1
]}

机构：

[1] Coll Chem & Chem Engn, State Key Lab Appl Organ Chem, Key Lab Nonferrous Met Chem & Resources Utilizat, Lanzhou 730000, Peoples R China

来源：

CATALYSIS SCIENCE & TECHNOLOGY | 2016年 / 6卷 / 02期

基金：

中国国家自然科学基金;

关键词：

RING-OPENING POLYMERIZATION; INDIUM ALKOXIDE COMPLEXES; STEREOSELECTIVE POLYMERIZATION; ALUMINUM COMPLEXES; ZINC-COMPLEXES; COORDINATION CHEMISTRY; EPSILON-CAPROLACTONE; BETA-BUTYROLACTONE; RACEMIC LACTIDE; CROWN-ETHER;

D O I：

10.1039/c5cy01194a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A series of simple sodium and potassium phenolates can highly isoselectively catalyze the polymerization of rac-lactide (with a high Pm value of up to 0.89). Isotactic multi-block polymers were obtained with a longest average isotactic length of 9 (18 lactic acid units) and the highest melting point of the polymer reaching up to 187.8 degrees C. One highly active potassium complex can even catalyze the polymerization of 1000 equivalents of rac-lactide and afford polylactide with a desired molecular weight and narrow polydispersity index (PDI). Experimental results also demonstrate that steric hindrance and electronic effects have significant effects on the behaviors of these catalysts in the ROP of rac-lactide.

引用

页码：515 / 520

页数：6

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