Chain Extension and Thermal Analysis of Poly(L-lactic acid)

De-ling LI; Qin HE; Fan-yue MENG; Mei-mei DONG

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Chain Extension and Thermal Analysis of Poly(L-lactic acid)

更新时间：2022-09-18

- Chain Extension and Thermal Analysis of Poly(L-lactic acid)
- Polymer Bulletin Vol. 26, Issue 3, Pages: 67-70(2013)
- 作者机构：
  
  唐山师范学院化学系，唐山　063000
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2013-03，
  
  Received：20 September 2012，
  
  Revised：01 November 2012，
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De-ling LI, Qin HE, Fan-yue MENG, Mei-mei DONG. Chain Extension and Thermal Analysis of Poly(L-lactic acid). [J]. Polymer Bulletin 26(3):67-70(2013)
DOI：

De-ling LI, Qin HE, Fan-yue MENG, Mei-mei DONG. Chain Extension and Thermal Analysis of Poly(L-lactic acid). [J]. Polymer Bulletin 26(3):67-70(2013) DOI：

摘要

采用

-乳酸熔融缩聚

制备了粘均相对分子质量较低的聚乳酸

并以亚磷酸三苯酯和1

4-丁二醇二缩水甘油醚为扩链剂对其扩链。亚磷酸三苯酯和1

4-丁二醇二缩水甘油醚可以有效提高聚乳酸的粘均相对分子质量

但是

扩链产物PLLA-TPPi和PLLA-BDDE的粘均相对分子质量未随亚磷酸三苯酯和1

4-丁二醇二缩水甘油醚的用量呈线性变化

而是表现为一峰值。PLLA-TPPi和PLLA-BDDE的玻璃化温度均随扩链产物的粘均相对分子质量的增大而提高;与PLLA-BDDE相比

PLLA-TPPi链中的TPPi结构更能有效促进PLLA链的结晶。

Abstract

Poly(L-lactic acid) with low viscosity average molecular weight prepared by melt polycondensation of L-lactic acid was extended by triphenyl phosphate and 1

4-butanediol diglycidyl ether

respectively. Triphenyl phosphate and 1

4-butanediol diglycidyl ether were effectively chain extender

which was confirmed by the results that viscosity average molecular weight was promoted obviously after chain extension of PLLA. However

viscosity average molecular weight of PLLA-TPPi and PLLA-BDDE did not change with the content of TPPi or the content of BDDE

but exhibited a peak value. T

of PLLA-TPPi and PLLA-BDDE increased with the increasing of viscosity average molecular weight. Compared with PLLA-BDDE

the structure of TPPi in PLLA-TPPi chain was more effective to promote the crystallization of PLLA.

关键词

熔融缩聚扩链亚磷酸三苯酯14-丁二醇二缩水甘油醚

Keywords

Melt polycondensationChain extensionTriphenyl phosphate14-Butanediol diglycidyl ether

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