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One‐Pot Terpolymerization of CO 2 , Propylene Oxide and Lactide Using Rare‐earth Ternary Catalyst
Author(s) -
Gu Lin,
Qin Yusheng,
Gao Yonggang,
Wang Xianhong,
Wang Fosong
Publication year - 2012
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201200636
Subject(s) - chemistry , comonomer , propylene oxide , propylene carbonate , thermal stability , catalysis , lactide , copolymer , ternary operation , polymer chemistry , thermal decomposition , polymerization , molar mass distribution , nuclear chemistry , polymer , organic chemistry , ethylene oxide , electrode , computer science , electrochemistry , programming language
A convenient one‐pot terpolymerization of CO 2 , propylene oxide (PO), and L ‐lactide ( L ‐LA) in short polymerization time (10 h or shorter) to afford poly(propylene carbonate‐lactide) with excellent mechanical property and thermal stability using Y(CCl 3 COO) 3 ‐ZnEt 2 ‐glycerin rare‐earth ternary catalyst is reported. The yield of the copolymerization was between 69.7 and 111.7 g/(g Zn), corresponding to L ‐LA/PO molar feed ratio varying from 0 to 0.1, and the number average molecular weight was between 5.5×10 4 and 11.9×10 4 . The L ‐LA content in the terpolymer increased from 1.1% to 34.7% when L ‐LA/PO molar feed ratio changed from 0.01 to 0.1. Introducing L ‐LA as the third comonomer could significantly improve the mechanical strength and thermal stability of PPC. For the terpolymer obtained from L ‐LA/PO molar feed ratio of 1:50, the elongation at break reached 40.5%, which is 3 times of that of pure PPC, and the thermal decomposition temperature increased by 32°C compared with pure PPC.