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
收藏
页码：122 / 128
页数：7
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