Isothermal cold crystallization kinetics of polylactide/nucleating agents

被引：178
|
作者：
Liao, Ruogu [1 ]
Yang, Bin [1 ]
Yu, Wei [1 ]
Zhou, Chixing [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Dept Polymer Sci & Engn, Shanghai 200030, Peoples R China
来源：
JOURNAL OF APPLIED POLYMER SCIENCE | 2007年 / 104卷 / 01期
关键词：
crystallization; nucleation; differential scanning calorimetry (DSC);
D O I：
10.1002/app.25733
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The isothermal cold crystallization kinetics of polylactide (PLA)/nucleating agents (CaCP3, TiO2, and BaSO4, content from 0.5-2.0 wt %) was investigated by differential scanning calorimetry in the temperature range of 120-124 degrees C. With blending nucleating agents, the crystallinity of PLA had a maximum crystallinity of 14.9%. Crystallization rate decreased with increasing crystallization temperature in the researched content range. The crystallization rate followed the Avrami equation with the exponent n around 4.5. From Lauritzen-Hoffman equation, the nucleation parameter K-g was estimated. And from the value of K-g, regime 11 crystallization behavior can be concluded. Then the lateral and fold surface free energy were calculated from K-g. (c) 2007 Wiley Periodicals, Inc.
引用
收藏
页码：310 / 317
页数：8
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