| Ring-opening Copolymerization of Cyclohexene Oxide and Maleic Anhydride Catalyzed by Mononuclear [Zn（L）（H2O）] or Binuclear [Zn2（L）（OAc）2（H2O）] Complex Based on the Salen-type Schiff-base Ligand |
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| 引用本文： | 吕兴强,卢荣.Ring-opening Copolymerization of Cyclohexene Oxide and Maleic Anhydride Catalyzed by Mononuclear [Zn（L）（H2O）] or Binuclear [Zn2（L）（OAc）2（H2O）] Complex Based on the Salen-type Schiff-base Ligand[J].高分子科学,2014,32(6):768-777. |
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| 作者姓名： | 吕兴强 卢荣 |
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| 作者单位： | Shaanxi Key Laboratory of Degradable Medical Material, Northwest University, Xi ＇an 710069, China |
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| 基金项目： | This work was financially supported by the National Natural Science Foundation of China （Nos. 91222201, 21173165 and 20871098）, the Program for New Century Excellent Talents in Universities from the Ministry of Education of China （No. NCET-10-0936）, the State Key Laboratory of Structure Chemistry （20100014）, the Provincial Natural Foundation （2011JQ2011） of Shaanxi, the Education Committee Foundation of Shaanxi Province （11JK0588, 12JK0577）, Graduate Innovation and Creativity Fund （YZZ12038） of Northwest University and Hong Kong Research Grants Council （HKBU 202407 and FRG/06-07/II- 16）. |
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| 摘 要： | From the self-assembly of the typical Salen-type Schiff-base ligand H2L and Zn(OAc)2·2H2O in the molar ratio of 1:1 or 1:2, the mononuclear Zn(L)(H2O)](1) or binuclear Zn2(L)(OAc)2(H2O)](2) are obtained, respectively. For both complexes 1 and 2, the unsaturated five-coordinate coordination environment to the catalytic active centers(Zn2+ ions) permits the monomer insertion for the effective solution copolymerization of cyclohexene oxide and maleic anhydride. All the solution copolymerizations afford poly(ester-co-ether)s, while lower catalyst and co-catalyst concentrations are helpful for the formation of alternating polyester. Of the three co-catalysts, 4-(dimethylamino)pyridine is found to be the most efficient, while an excess thereof is detrimental for chain growth of the copolymers.
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| 关 键 词： | 催化活性中心 氧化环己烯 席夫碱配体 开环共聚 马来酸酐 锌离子 en型 Sal |
Ring-opening copolymerization of cyclohexene oxide and maleic anhydride catalyzed by mononuclear [Zn(L)(H2O)] or binuclear [Zn2(L)(OAc)2(H2O)] complex based on the Salen-type Schiff-base ligand |
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| Li-ying Wu,Dai-di Fan,Xing-qiang Lü,Rong Lu.Ring-opening copolymerization of cyclohexene oxide and maleic anhydride catalyzed by mononuclear [Zn(L)(H2O)] or binuclear [Zn2(L)(OAc)2(H2O)] complex based on the Salen-type Schiff-base ligand[J].Chinese Journal of Polymer Science,2014,32(6):768-777. |
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| Authors: | Li-ying Wu Dai-di Fan Xing-qiang Lü Rong Lu |
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| Institution: | 1. Shaanxi Key Laboratory of Degradable Medical Material, Northwest University, Xi’an, 710069, China
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| Abstract: | From the self-assembly of the typical Salen-type Schiff-base ligand H 2 L and Zn(OAc)2·2H2O in the molar ratio of 1:1 or 1:2, the mononuclear Zn(L)(H2O)] (1) or binuclear Zn2(L)(OAc)2(H2O)] (2) are obtained, respectively. For both complexes 1 and 2, the unsaturated five-coordinate coordination environment to the catalytic active centers (Zn2+ ions) permits the monomer insertion for the effective solution copolymerization of cyclohexene oxide and maleic anhydride. All the solution copolymerizations afford poly(ester-co-ether)s, while lower catalyst and co-catalyst concentrations are helpful for the formation of alternating polyester. Of the three co-catalysts, 4-(dimethylamino)pyridine is found to be the most efficient, while an excess thereof is detrimental for chain growth of the copolymers. |
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| Keywords: | Mononuclear [Zn（L）（H2O）] （1） or binuclear [Znz（L）（OAc）z（H2O）] （2） based on Salen-type Schiffobase ligandHzL Ring-opening copolymerization from CHO and MA Poly（ester-co-ether） and polyester |
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