| 低毒锌类催化剂制备聚乳酸的研究 |
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| 引用本文： | 华佳捷 杨 建 胡艳飞 韦 嘉 李速明. 低毒锌类催化剂制备聚乳酸的研究[J]. 化学学报, 2008, 66(24): 2730-2734 |
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| 作者姓名： | 华佳捷 杨 建 胡艳飞 韦 嘉 李速明 |
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| 作者单位： | (复旦大学材料科学系 上海 200433) |
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| 基金项目： | 上海市浦江人才计划 |
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| 摘 要： | 采用低毒锌类催化剂制备了一系列具有高分子量、不同光学纯度及热力学性质的聚乳酸材料. 以金属锌作催化剂制备丙交酯, 研究了不同裂解温度对产物光学纯度的影响. 随后在低毒催化剂乳酸锌的作用下使丙交酯开环聚合, 进一步研究了单体的光学纯度对聚乳酸立体规整性的影响, 以及聚合过程中的结晶对聚合物分子量和热力学行为的影响. 并用旋光仪、核磁共振氢谱(1H NMR)、凝胶渗透色谱(GPC)、差示扫描量热分析(DSC)等方法对产物进行表征. 结果表明, 合适的裂解温度有利于合成高光学纯度的丙交酯; 在低毒乳酸锌的催化作用下, 高光学纯度的单体以及聚合过程中的结晶都有利于制备高分子量聚乳酸.
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| 关 键 词： | 乳酸锌 光学纯度 聚乳酸 开环聚合 配位-插入聚合 |
| 收稿时间： | 2008-04-03 |
| 修稿时间： | 2008-07-25 |
Synthesis of Polylactide with Low-toxic Zinc Catalysts |
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| HUA,Jia-Jie YANG,Jian HU,Yan-Fei WEI,Jia LI,Su-Ming. Synthesis of Polylactide with Low-toxic Zinc Catalysts[J]. Acta Chimica Sinica, 2008, 66(24): 2730-2734 |
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| Authors: | HUA Jia-Jie YANG Jian HU Yan-Fei WEI Jia LI Su-Ming |
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| Affiliation: | (Department of Materials Science, Fudan University, Shanghai 200433) |
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| Abstract: | A series of polylactides (PLA) with high molecular weights, various optical purities and thermal properties have been prepared using low-toxic zinc as catalysts. The effects of splitting temperature on opti- cal purity of lactide were discussed. Low-toxic zinc lactate was used as catalyst for bulk ring-opening po- lymerization of lactide. The effects of optical purity of monomers on the stereo structure of PLA as well as the crystallization on the molecular weight and thermal property were investigated. The resulting monomers and polymers were characterized by polarimetry, 1H NMR, DSC and GPC. It was shown that high optical purity lactide and crystallization in polymerization led to higher molecular weight PLA using low-toxic zinc lactate as catalyst. |
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| Keywords: | zinc lactate optical purity polylactide ring-opening polymerization coordination-insert po- lymerization |
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