聚乳酸/聚己内酯增容体系的结晶性能

doi:10.19491/j.issn.1001-9278.2017.12.011

中国塑料 ›› 2017, Vol. 31 ›› Issue (12): 62-65.DOI: 10.19491/j.issn.1001-9278.2017.12.011

聚乳酸/聚己内酯增容体系的结晶性能

张春梅¹,翟天亮²

1. 贵阳学院
2. 贵州省建材产品质量监督检验院

收稿日期:2017-08-28 修回日期:2017-09-13 出版日期:2017-12-26 发布日期:2017-12-29
基金资助:
国家自然科学基金项目;贵州省普通高等学校科技拔尖人才支持技划;国家质量监督检验检疫总局科技计划项目

Crystallization Behavior of Compatibilized Polylactide/Polycaprolactone Blends

Received:2017-08-28 Revised:2017-09-13 Online:2017-12-26 Published:2017-12-29

摘要/Abstract

摘要： 以丙交酯/己内酯共聚物（LACL）为聚乳酸(PLA)/聚己内酯(PCL)共混物的增容剂，采用溶液共混法制备了PLA/PCL/LACL三元共混物；通过扫描电子显微镜、差示扫描量热仪研究了共混物的形貌和结晶性能。结果表明，加入5 %（质量分数，下同）的LACL，分散相的尺寸明显减小；PCL能显著提高PLA分子链的结晶能力，使其结晶温度（Tp）降低，而LACL对PLA/PCL的增容作用，使PLA/PCL/LACL三元共混物中PLA的Tp进一步降低；通过Kissinger方程计算发现PCL和LACL的加入显著降低了PLA的结晶活化能。

Abstract: Polylactide(PLA)/polycaprolactone(PCL) blends were prepared by using lactide-caprolactone copolymer(LACL) through a solution-blending method. Morphologies and crystallization behavior of the resulting blends were characterized by scanning electron microscopy and differential scanning calorimetry. The results indicated the dispersed phase exhibited a dramatic decrease in size with the addition of 5 % LACL. The crystalline capability of PLA molecules was greatly enhanced by PCL, thus resulting in a decrease in crystallization temperature. The crystallization temperature of PLA domain in PLA/PCL/LACL ternary blends was further reduced due to compatibilizing effect of LACL. The crystallization activation energies of PLA domain presented a decrease due to the presence of PCL and LACL on the basis of the calculation results derived from Kissinger’s model.

张春梅翟天亮. 聚乳酸/聚己内酯增容体系的结晶性能[J]. 中国塑料, 2017, 31(12): 62-65.

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聚乳酸/聚己内酯增容体系的结晶性能

Crystallization Behavior of Compatibilized Polylactide/Polycaprolactone Blends

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