Influences of Complex Catalytic System on the Synthesis of Poly(lactic acid) through Melt-solid Polycondensation

Qi-fan WU; You-bing YANG; Zheng-qian SUN; Hong-juan ZHENG

doi:10.14028/j.cnki.1003-3726.2016.03.011

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Influences of Complex Catalytic System on the Synthesis of Poly(lactic acid) through Melt-solid Polycondensation

更新时间：2022-09-12

- Influences of Complex Catalytic System on the Synthesis of Poly(lactic acid) through Melt-solid Polycondensation
- Polymer Bulletin Vol. 29, Issue 3, Pages: 69-76(2016)
- 作者机构：
  
  河南工业大学材料科学与工程学院，郑州 450001
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2016.03.011
  CLC：
- Published：20 March 2016，
  
  Received：09 August 2015，
  
  Revised：06 November 2015，
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Qi-fan WU, You-bing YANG, Zheng-qian SUN, Hong-juan ZHENG. Influences of Complex Catalytic System on the Synthesis of Poly(lactic acid) through Melt-solid Polycondensation. [J]. Polymer Bulletin 29(3):69-76(2016)
DOI：

Qi-fan WU, You-bing YANG, Zheng-qian SUN, Hong-juan ZHENG. Influences of Complex Catalytic System on the Synthesis of Poly(lactic acid) through Melt-solid Polycondensation. [J]. Polymer Bulletin 29(3):69-76(2016) DOI： 10.14028/j.cnki.1003-3726.2016.03.011.

摘要

使用氯化亚锡/对甲苯磺酸(SnCl

/TSA)复合催化剂对聚乳酸熔融/固相聚合进行研究

通过使用乌氏粘度法

傅里叶变换红外光谱分析、差示扫描量热法对聚乳酸产品进行表征及分析。结果表明:聚乳酸熔融聚合过程中

使用的复合催化剂总含量为0.6%(wt)(SnCl

和TSA分别为0.3%(wt))

能获得较高分子量的聚乳酸低聚物。使用单一组分0.5wt%的SnCl

作催化剂

以熔融聚合获得的低聚物为原料进行固相聚合后

获得的聚乳酸粘均分子量是熔融聚合的3.7倍

且其相对分子量能达到最大值。

Abstract

Lactic acid was catalyzed by the complex catalytic system of SnCl

and TSA to study the influence on the Synthesis of PLA through Melt-solid Polycondensation

and the products of the polymer were characterized by Ubbelohde viscosity-average molecular

Fourier Transform infrared spectroscopy and Differential scanning calorimeter method. The results show that: The high molecular weight of PLA oligomer could be obtained

when the total content of composite catalyst is 0.6%(wt) (SnCl

and TSA all were 0.3%(wt)). When solid polymerization was carried out with a single component catalyst of 0.5%(wt) SnCl

the viscosity average molecular weight of the solid phase were increased to 3.7 times as compared with the melt polymerization. the molecular of PLA

which synthesize by solid polymerization

can reach the maximum value as well.

关键词

聚乳酸熔融聚合固相聚合SnCl2；TSA

Keywords

PLAMelt polycondesationSolid polycondesationSnCl2TSA

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College of life sciences, Northwest Normal University

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