Crystallization kinetics of toughed poly(butylene terephthalate)/polycarbonate blends

被引:24
作者
Bai, Huiyu
Zhang, Yong [1 ]
Zhang, Yinxi
Zhang, Xiangfu
Zhou, Wen
机构
[1] Shanghai Jiao Tong Univ, Res Inst Polymer Mat, Shanghai 200240, Peoples R China
[2] Shanghai PRET Composites Co Ltd, Shanghai 201700, Peoples R China
关键词
poly(butylene terephthalate); polycarbonate; ethylene-butylacrylate-glycidyl methacrylate copolymer; ethylene-1-octylene copolyrner; crystallization kinetics; nonisothermal; isothermal;
D O I
10.1002/app.22669
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 crystallization kinetics of pure poly(butylene terephthalate) (PBT) and toughed modification PBT/polycarbonate (PC) blends with ethylene-butylacrylate-glycidyl methacrylate copolymer (PTW) and ethylene-1-octylene copolymer (POE) were studied. For nonisothermal crystallization process studies, the Ozawa theory and an equation combining the Avrami and Ozawa equation are used. It is found that the Ozawa analysis fails to provide an adequate description of the nonisothermal crystallization process in PBT, PBT/PC, and toughed PBT/PC blends, while the combination of the Avrami and Ozawa equations exhibit great advantages in treating the nonisothermal crystallization kinetics. The activation energies are determined by the Kissinger method for nonisothermal crystallization. The activation energy for PBT/PC/PTW/POE blend is greater than those of PBT/PC, and PBT/PC/POE blends. Isothermal crystallization processes were studied by the Avrami equation. The results show that the values of the Avrami exponent n for PBT, PBT/PC, and toughed PBT/PC blends are 3.8, 3.0, and 2.8-3.2, respectively. The Avrami rate constant K for PBT, PBT/PC, and toughed PBT/PC blends increase in following order: K-PBT/PC < K-PBT/PC/POE < K-PBT/PC/PTW/POE < K-PBT (c) 2006 Wiley Periodicals, Inc.
引用
收藏
页码:1295 / 1308
页数:14
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