| 直接熔融聚合合成聚L-乳酸 |
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| 引用本文： | 谭凯广,黄关葆,杨则林. 直接熔融聚合合成聚L-乳酸[J]. 合成纤维工业, 2007, 30(2): 29-31 |
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| 作者姓名： | 谭凯广 黄关葆 杨则林 |
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| 作者单位： | 北京服装学院,北京,100029;北京服装学院,北京,100029;北京服装学院,北京,100029 |
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| 摘 要： | 以L-乳酸为原料,采用正交试验方法,研究了直接熔融聚合工艺对聚L-乳酸(PLLA)粘均相对分子质量的影响,并对PLLA的热性能进行了表征。结果表明:以氯化亚锡和分子筛为催化剂,其质量分数为0．5%,聚合温度170℃,聚合时间5 h,PLLA的相对分子质量可达到15 000,其玻璃化转变温度为57．03℃,熔点为148．5℃。
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| 关 键 词： | L-乳酸 聚乳酸 正交实验 直接熔融聚合 相对分子质量 热性能 |
| 文章编号： | 1001-0041(2007)02-0029-03 |
| 修稿时间： | 2006-09-12 |
Synthesis of poly-L-lactic acid by direct melt polymerization |
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| Tan Kaiguang,Huang Guanbao,Yang Zelin. Synthesis of poly-L-lactic acid by direct melt polymerization[J]. China Synthetic Fiber Industry, 2007, 30(2): 29-31 |
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| Authors: | Tan Kaiguang Huang Guanbao Yang Zelin |
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| Affiliation: | Beijing Institute of Clothing Technology, Beijing 100029 |
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| Abstract: | Using L-lactic acid as raw material,the effects of direct melt polymerization process on the viscosity average molecu- lar weight of poly-L-lactic acid(PLLA)were studied by orthogonal experiments.And the thermal properties of PLLA were char- acterized.The results showed that PLLA with relative molecular weight mass up to 15 000 can be prepared using the combination of stannous chloride and molecular sieve as catalyst of 0.5% by mass fraction when the polymerization temperature and time were 170℃and 5 h respectively.The glass transition point and melting point of the obtained PLLA were 57.03℃and 148.5℃re- spectively. |
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| Keywords: | L-lactic acid polylactic acid orthogonal experiment direct melt polymerization relative molecular weight mass thermal property |
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