| Homo-and Copolymerization of ε-Caprolactone and 2,2-Dimethyltrimethylene Carbonate by Rare Earth Initiators |
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| 引用本文： | 沈之荃,祝桂香,凌君. Homo-and Copolymerization of ε-Caprolactone and 2,2-Dimethyltrimethylene Carbonate by Rare Earth Initiators[J]. 中国化学, 2002, 20(11): 1369-1374. DOI: 10.1002/cjoc.20020201136 |
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| 作者姓名： | 沈之荃 祝桂香 凌君 |
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| 作者单位： | SHEN，Zhi-Quan ZHU，Gui-Xiang LING，JunDepartment of Polymer Science and Engineering，Zhejiang University，Hangzhou，Zhejiang 310027，China |
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| 基金项目： | theNationalNaturalScienceFoundationofChina (Nos.2 99740 2 4,2 0 1740 33and 2 0 2 5 40 0 1)andtheMajorStateBasicResearchDevelopmentProgramofChineseMinistryofScienceandTechnology (No .G1990 6 480 1) |
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| 摘 要： | ＩｎｔｒｏｄｕｃｔｉｏｎＡｌｉｐｈａｔｉｃｐｏｌｙｅｓｔｅｒｓａｎｄｐｏｌｙｃａｒｂｏｎａｔｅｓｈａｖｅａｔｔｒａｃｔ ｅｄｇｒｏｗｉｎｇｉｎｔｅｒｅｓｔｆｏｒｔｈｅｉｒｅｘｃｅｌｌｅｎｔｐｒｏｐｅｒｔｉｅｓｏｆｂｉｏｄｅｇｒａｄａｂｉｌｉｔｙ ,ｂｉｏｃｏｍｐａｔｉｂｉｌｉｔｙａｎｄｌｏｗｔｏｘｉｃｉｔｙ .Ｔｈｅｉｒｅｘｐｅｃｔｅｄｕｓｅｓｉｎｃｌｕｄｅｄｒｕｇｄｅｌｉｖｅｒｙｍｅｄｉｕｍ ,ｓｕｒｇｉｃａｌｓｕ ｔｕｒｅｓ ,ｂｏｄｙｉｍｐｌａｎｔｍａｔｅｒｉａｌｓ ,ｃｅｌｌｃｕｌｔｕｒｅｓｕｂｓｔ…
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Homo‐ and Copolymerization of ε‐Caprolactone and 2,2‐Dimethyltrimethylene Carbonate by Rare Earth Initiators |
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| SHEN,Zhi-Quan ZHU,Gui-Xiang LING,Jun. Homo‐ and Copolymerization of ε‐Caprolactone and 2,2‐Dimethyltrimethylene Carbonate by Rare Earth Initiators[J]. Chinese Journal of Chemistry, 2002, 20(11): 1369-1374. DOI: 10.1002/cjoc.20020201136 |
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| Authors: | SHEN Zhi-Quan ZHU Gui-Xiang LING Jun |
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| Affiliation: | SHEN,Zhi-Quan ZHU,Gui-Xiang LING,JunDepartment of Polymer Science and Engineering,Zhejiang University,Hangzhou,Zhejiang 310027,China |
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| Abstract: | Rare earth tris(2,6‐di‐tert‐butyl‐4‐methylphenolate) [Ln‐(OAr)3, Ln = La, Nd, Dy, Y] alone has been developed to initiate polymerization of e‐caprolactone (CL) and random copolymerization of CL with 2, 2‐dimethyltrimethylene carbonate (DTC). The structures of polymers were analyzed by GPC, ER and NMR methods. Their crystal and thermal properties were discussed in terms of DSC. The initiating efficiencies were mainly affected by the size of rare earth metal in the sequence of La(OAr)3 > Nd(OAr)3 ～ Y(OAr)3 > Dy(OAr)3. La‐(OAr)3 exhibited rather high activity to prepare PCL with a molecular weight of 2.15 × 105 and Ma/Ma of 2.27. The composition of random copolymer can be quantitatively controlled either by reaction time or by feed ratio of monomer. |
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| Keywords: | ring-opening polymerization random copolymerization rare earth initiator aliphatic polyester |
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