Non-symmetrical aluminium salen complexes: Synthesis and their reactivity with cyclic ester

被引：10

作者：

Duan, Ranlong ^{[1
]}

Sun, Zhiqiang ^{[1
]}

Pang, Xuan ^{[1
]}

Hu, Chenyang ^{[1
]}

Shao, Huili ^{[2
]}

Chen, Xuesi ^{[1
]}

Wang, Xianhong ^{[1
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Appl Chem, Key Lab Polymer Ecomat, Changchun 130022, Peoples R China

[2] Donghua Univ, State Key Lab Modificat Chem Fibers & Polymer Mat, Shanghai 20051, Peoples R China

来源：

POLYMER | 2015年 / 77卷

基金：

中国国家自然科学基金;

关键词：

Half-salen; Ring-opening polymerization; Lactide; RING-OPENING POLYMERIZATION; STEREOSELECTIVE POLYMERIZATION; EPSILON-CAPROLACTONE; RACEMIC LACTIDE; RAC-LACTIDE; BASE COMPLEX; MECHANISM; CATALYSTS; LIGAND; METAL;

D O I：

10.1016/j.polymer.2015.09.036

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Non-symmetrical aluminium salen complexes that contained different substituents were designed and synthesized. All the ligands and their complexes were characterized by H-1, C-13 NMR and elemental analysis. These complexes can be used as catalysts to produce polylactide and poly-epsilon-caprolactone. All polymerizations were living and molar mass distributions were narrow. The M-n(obsd) of the isolated polymers were in good agreement with M-n(calcd). The polymerization rate of electrophilic substituted complex was higher than the non-electrophilic substituted analogies. The bulky substituents with more steric hindrance of the complexes had relatively lower activity. Kinetic studies showed that the polymerizations were both first-ordered with respect to lactide and epsilon-caprolactone monomers. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：122 / 128

页数：7

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