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个人信息Personal Information
研究员
博士生导师
硕士生导师
性别：男
毕业院校：大连理工大学
学位：博士
所在单位：化工学院
学科：应用化学. 精细化工. 高分子化学与物理
办公地点：大连理工大学西校区化工实验楼E-330
联系方式：liuye@dlut.edu.cn
电子邮箱：liuye@dlut.edu.cn
Stereoregular Polycarbonate Synthesis: Alternating Copolymerization of CO2 with Aliphatic Terminal Epoxides Catalyzed by Multichiral Cobalt(III) Complexes
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论文类型：期刊论文
发表时间：2011-11-15
发表刊物：JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
收录刊物：Scopus、SCIE、EI
卷号：49
期号：22
页面范围：4894-4901
ISSN号：0887-624X
关键字：carbon dioxide; catalysis; cobalt; copolymerization; epoxide; isotactic; polymerization catalysis; regioselective ring opening; ring-opening polymerization; stereochemistry control
摘要：Completely stereoregular polycarbonate synthesis was achieved with the use of unsymmetric multichiral cobalt-based complexes bearing a derived chiral BINOL and an appended 1,5,7-triabicyclo[4.4.0] dec-5-ene as catalyst for the copolymerization of CO2 and aliphatic terminal epoxides at mild conditions. The (S,S,S)-Co(III) complex 1c with sterically hindered substituent group is more stereoregular catalyst for the copolymerization of CO2 and racemic propylene oxide to afford a perfectly regioregular poly(propylene carbonate) (PPC), with >99% head-to-tail linkages, >99% carbonate link-ages, and a K-rel of 24.4 for the enchainment of (R)-epoxide over (S)-epoxide. The isotactic PPC exhibits an enhanced glass transition temperature of 47 degrees C, which is 10-12 degrees C higher than that of the corresponding irregular polycarbonate. (C) 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 49: 4894-4901, 2011