文献类型：期刊文献

英文题名：Copolymerization of CO2 and propylene oxide using ZnGA/DMC composite catalyst for high molecular weight poly(propylene carbonate)

作者：Meng, Qingyang[1,2];Cheng, Ruihua[1,2];Li, Jiajia[1,2];Wang, Tingting[1,2];Liu, Boping[1,2]

机构：[1]State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Key Lab Multiphase Mat Chem Engn, Shanghai 200237, Peoples R China

年份：2016

卷号：16

起止页码：86

外文期刊名：JOURNAL OF CO2 UTILIZATION

收录：;EI(收录号：20162902604836);WOS:【SCI-EXPANDED(收录号:WOS:000389089200010)】；

基金：The authors are grateful for financial support by Key Projects in the National Science & Technology Pillar Program during the 12th Five-Year Plan Period (2013BAC11B04) of the People's Republic of China, Wanhua Industrial Group of Yantai.

语种：英文

外文关键词：Carbon dioxide; Copolymerization; ZnGA/DMC; Composite catalyst; Synergistic effects

摘要：The high yield and high molecular weight poly(propylene carbonate) (PPC) was synthesized via copolymerization of propylene oxide (PO) and carbon dioxide (CO2) catalyzed over zinc glutarate/double metal cyanide (ZnGA/DMC) composite catalyst. A fine crystalline ZnGA component was prepared using the crosslinked restrain effect of nonionic surfactant. Combined with a small amount of DMC, the ZnGA/DMC (molar ratio =10:1) composite catalyst system showed an excellent synergistic effect on CO2/PO copolymerization with higher activity, selectivity, and shorter reaction time than those of the traditional ZnGA catalyst. Under the optimized reaction conditions, the molecular weight of PPC was up to 3.8 x 10(5) gimol at the highest yield of 508.0 g(polym/gcat), and the selectivity was over 97.7% towards polycarbonates rather than polyether linkages. The alternating copolymer PPC exhibited good thermostability, high glass transition temperature (42.0 degrees C) and high decomposition temperature (5% weight loss at 253.4 degrees C). A synergistic mechanism of ZnGA/DMC composite catalyst was speculated. (C) 2016 Elsevier Ltd. All rights reserved.