| 用变温红外研究聚乳酸嵌段共聚物生成过程中的化学反应 |
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| 引用本文： | 李兰,徐红,滕翠青,余木火. 用变温红外研究聚乳酸嵌段共聚物生成过程中的化学反应[J]. 材料科学与工程学报, 2006, 24(5): 670-672 |
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| 作者姓名： | 李兰 徐红 滕翠青 余木火 |
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| 作者单位： | 东华大学分析测试中心,上海,200051;东华大学材料科学与工程学院,纤维材料改性国家重点实验室,上海,200051 |
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| 摘 要： | 本文采用熔融缩聚法合成一定分子量的聚乳酸(PLA),采用聚己内酯多元醇(PCL)的聚氨酯预聚体进行共聚反应,以制得PLA-PCL嵌段共聚物.采用变温红外研究了PLA预聚体与PCL预聚体的反应活性,并研究了共聚产物的分子量.结果表明,PLA预聚体与PCL预聚体具有很高的反应活性,共聚后PLA的分子量有大幅度提高.
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| 关 键 词： | 聚乳酸 嵌段共聚物 反应红外 反应活性 |
| 文章编号： | 1673-2812(2006)05-0670-03 |
| 修稿时间： | 2005-10-20 |
Study on the Reaction between PLLA and PCL Prepolymers by in Situ FTIR |
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| LI Lan,XU Hong,TENG Cui-qing,YU Mu-huo. Study on the Reaction between PLLA and PCL Prepolymers by in Situ FTIR[J]. Journal of Materials Science and Engineering, 2006, 24(5): 670-672 |
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| Authors: | LI Lan XU Hong TENG Cui-qing YU Mu-huo |
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| Abstract: | In this paper,PLLA prepolymers were synthesized by melt polycondensation,and then PLLA-PCL were prepared by using the coupling reaction between PLLA prepolymer and PCL prepolymer with-NCO terminals.In situ FTIR was used to characterize the activity of reaction between-NCO groups at the end of PCL and-OH(or -COOH) groups at the end of PLLA,and results showed that the reaction was of high activity.Gel permeation chromatography(GPC) data indicated that the molecular weight of PLLA-PCL multiblock copolymers was higher than that of PLLA prepolymer. |
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| Keywords: | poly(L-lactic acid) multiblock copolymer In situ FTIR reaction activity |
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