| 环氧扩链端羧基乳酸预聚物 |
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| 引用本文： | 谢辉辉,周正发,徐卫兵.环氧扩链端羧基乳酸预聚物[J].塑料,2011,40(4). |
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| 作者姓名： | 谢辉辉 周正发 徐卫兵 |
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| 作者单位： | 合肥工业大学高分子科学与工程系,安徽,合肥230009 |
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| 摘 要： | L-乳酸先熔融缩聚成乳酸预聚物,再以丁二酸酐封端,最后以环氧树脂AG80进行扩链.采用傅里叶红外光谱仪、差示扫描量热仪与热重分析仪对扩链产物进行结构性能表征.探讨丁二酸酐用量、扩链剂用量、催化剂类型与用量、反应条件对扩链反应的影响.结果表明:丁二酸酐用量2.5％,环氧基团/羧基摩尔比1.5:1,催化剂为2-甲基咪唑,催化剂用量1.5％,在160℃下反应10 min时,扩链后聚乳酸粘均分子量达到145600.
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| 关 键 词： | 端羧基乳酸预聚物 环氧树脂 扩链反应 粘均分子量 性能 |
Chain Extension of Dicarboxylated Poly (L-lactic acid) Produced by Reaction with Epoxy Resin |
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| XIE Hui-hui,ZHOU Zheng-fa,XU Wei-bing.Chain Extension of Dicarboxylated Poly (L-lactic acid) Produced by Reaction with Epoxy Resin[J].Plastics,2011,40(4). |
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| Authors: | XIE Hui-hui ZHOU Zheng-fa XU Wei-bing |
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| Affiliation: | XIE Hui-hui,ZHOU Zheng-fa,XU Wei-bing(Department of Polymer Science and Engineering,Hefei University of Technology,Hefei,Anhui 230009,China) |
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| Abstract: | Lactic acid prepolymer was synthesized by melt polycondensation of L-lactic acid,and was subsequently copolymerized with succinic anhydride to produce dicarboxylated poly(L-lactic acid) catalyzed by stannous octoate.Poly(L-lactic acid) were prepared by chain extension of dicarboxylated poly(L-lactic acid) using epoxy resin of AG80 as a chain extender.The polymers had been characterized by FTIR,DSC,and TGA.Influences of succinic anhydride content,chain extender content,catalyst species and content,reaction c... |
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| Keywords: | Dicarboxylated poly(L-lactic acid) epoxy resin chain extension viscosity average molecular weight property |
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