Non-Isothermal Crystallization Kinetics of Poly(Butylene Terephthalate)/Silica Nanocomposites

被引：7

作者：

Yao, Xiayin ^{[1
]}

Tian, Xingyou ^{[1
]}

Zheng, Kang ^{[1
]}

Zhang, Xian ^{[1
]}

Zheng, Jin ^{[1
,3
]}

Wang, Ruoxi ^{[2
]}

Liu, Chen ^{[1
]}

Li, Yong ^{[2
]}

Cui, Ping ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China

[2] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo, Zhejiang, Peoples R China

[3] Zhongyuan Inst Technol, Dept Text Engn, Zhengzhou, Peoples R China

来源：

JOURNAL OF MACROMOLECULAR SCIENCE PART B-PHYSICS | 2009年 / 48卷 / 03期

关键词：

crystallization; kinetics; nanocomposites; poly(butylene terephthalate); silica; POLY(ETHYLENE TEREPHTHALATE)/ATTAPULGITE NANOCOMPOSITES; PHASE-CHANGE; BLENDS; BEHAVIOR; MELT; COMPATIBILIZATION; POLYMERIZATION; KETONE); PBT;

D O I：

10.1080/00222340902837642

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Poly(butylene terephthalate)/silica nanocomposites were prepared by in situ polymerization of terephthalic acid, 1,4-butanediol and silica. Transmission electron microscopy (TEM) was used to examine the quality of the dispersion of silica in the PBT matrix. The non-isothermal crystallization behavior of pure PBT and its nanocomposites was studied by differential scanning calorimetry (DSC). The results show that the crystallization peak temperatures of PBT/silica nanocomposites are higher than that of pure PBT at a given cooling rate. The values of halftime of crystallization indicate that silica could act as a heterogeneous nucleating agent in PBT crystallization and lead to an acceleration of crystallization. The non-isothermal crystallization data were analyzed with the Avrami, Ozawa, and Mo et al. models. The non-isothermal crystallization process of pure PBT and PBT/silica nanocomposites can be best described by the model developed by Mo et al. According to the Kissinger equation, the activation energies were found to be -217.1, -226.4, -259.2, and -260.2 kJ/mol for pure PBT and PBT/silica nanocomposites with silica weight content of 1, 3 and 5 wt%, respectively.

引用

页码：537 / 549

页数：13