| 聚乳酸基聚合物的制备研究 |
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| 引用本文： | 王伟,魏金芳,吴文泉,王丽红,李德玲,沈玉龙. 聚乳酸基聚合物的制备研究[J]. 化学世界, 2010, 51(3) |
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| 作者姓名： | 王伟 魏金芳 吴文泉 王丽红 李德玲 沈玉龙 |
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| 作者单位： | 唐山师范学院,化学系,河北唐山063600;唐山师范学院,玉田分院,河北唐山063600 |
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| 基金项目： | 唐山市科技局资助项目(07160213B) |
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| 摘 要： | 采用熔融缩聚法,以1,4-丁二醇、聚乙二醇-200和丁二酸为共缩聚单体,制备了聚乳酸基聚合物——L-乳酸-1,4-丁二醇-丁二酸共缩聚物和L-乳酸-聚乙二醇-丁二酸共缩聚物。PLLA链中引入柔性链的链段长度和柔性链比例是影响共缩聚物相对分子质量的关键因素。在相同缩聚条件下,L-乳酸-1,4-丁二醇-丁二酸共缩聚物相对分子质量比聚乳酸相对分子质量高,而且,随共缩聚单体的用量变化,其相对分子质量有一最大值。L-乳酸-聚乙二醇-丁二酸共缩聚物,由于在PLLA链中引入了较长的柔性链段,其相对分子质量并未大幅提高,甚至降低,且奇怪的是,共缩聚物PLADS-2、PLADS-3和PLADS-4的GPC曲线呈现双峰。
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| 关 键 词： | 熔融缩聚 聚乳酸 生物降解 包装材料 |
Preparation of Poly(L-lactic acid)-based Polymers |
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| WANG Wei,WEI Jin-fang,WU Wen-quan,WANG Li-hong,LI De-ling,SHEN Yu-long. Preparation of Poly(L-lactic acid)-based Polymers[J]. Chemical World, 2010, 51(3) |
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| Authors: | WANG Wei WEI Jin-fang WU Wen-quan WANG Li-hong LI De-ling SHEN Yu-long |
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| Affiliation: | Tangshan Normal College: a.Department of Chemistry;b.Department Yutian;Hebei Tangshan 064100;China |
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| Abstract: | Poly(L-lactic acid-co-1,4-butane diol-co-succinic acid) and poly(L-lacticacid-co-poly(ethylene glycol)-co-succinic acid) were prepared by melt polycondensation.The flexible segment length and the proportion of flexible segment in the PLLA chain were critical parameters influencing the M_n of poly(lactic acid)-based polymers.The Mn of Poly(L-lactic acid-co-1,4-butane diol-cosuccinic acid),prepared at the same polymerization conditions as PLLA,was higher than that of PLLA and went up to a maximum value with t... |
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| Keywords: | melt polycondensation PLLA biodegradable polymers package materials |
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