Ring-opening polymerization of ε-caprolactone and L-lactide using organic amino calcium catalyst

被引：87
|
作者：
Piao, LH [1 ]
Deng, MX [1 ]
Chen, XS [1 ]
Jiang, LS [1 ]
Jing, XB [1 ]
机构：
[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
来源：
POLYMER | 2003年 / 44卷 / 08期
关键词：
calcium catalyst; poly (epsilon-caprolactone); poly (L-lactide);
D O I：
10.1016/S0032-3861(03)00118-6
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Poly (6-caprolactone) (PCL) and poly (L-lactide) (PLA) were prepared by ring-opening Polymerization catalyzed by organic amino calcium catalysts (Ca/PO and Ca/EO) which were prepared by reacting calcium ammoniate Ca(NH3)(6) with propylene oxide and ethylene oxide, respectively. The catalysts exhibited high activity and the ring-opening polymerization behaved a quasi-living characteristic. Based on the Fr-IR spectra and the calcium contents of the catalysts, and based on the H-1 NMR end-group analysis of the low molecular weight PCL prepared using catalysts Ca/PO and Ca/EO, it was proposed that the catalysts have the structure of NH2-Ca-O-CH(CH3)(2) and NH2-CaO-CH2CH3 for Ca/PO and Ca/EO, respectively. The ring-opening polymerization of CL and LA follows a coordination-insertion mechanism and the active site is the Ca-O bond. (C) 2003 Elsevier Science Ltd. All fights reserved.
引用
收藏
页码：2331 / 2336
页数：6
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