Isothermal crystallization kinetics and melting behavior of poly(β-hydroxybutyrate)/poly(vinyl acetate) blends

被引:38
作者
An, YX [1 ]
Dong, LS [1 ]
Li, LX [1 ]
Mo, ZS [1 ]
Feng, ZL [1 ]
机构
[1] Chinese Acad Sci, Changchun Inst Appl Chem, Polymer Phys Lab, Changchun 130022, Peoples R China
关键词
D O I
10.1016/S0014-3057(98)00145-1
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 overall isothermal crystallization kinetics and melting behavior of poly(beta-hydroxybutyrate) (PHB)/poly(vinyl acetate) (PVAc) blends were studied by using differential scanning calorimetry(DSC). The Avrami analysis indicates that the addition of PVAc into PHB results in the decrease in the overall crystallization rate of the PHB phase, but does not affect PHB's nucleation mechanism and geometry of crystal growth. The activation energy of the overall process of crystallization increases with the increasing PVAc content in the blends. The phenomenon of multiple melting endotherms is observed, which is caused by melting and recrystallization during the DSC heating run. (C) 1998 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:365 / 369
页数:5
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