Crystallization behavior of polyamide 6/halloysite nanotubes nanocomposites

被引：127
作者：
Guo, Baochun [1 ]
Zou, Quanliang [1 ]
Lei, Yanda [1 ]
Du, Mingliang [1 ]
Liu, Mingxian [1 ]
Jia, Demin [1 ]
机构：
[1] S China Univ Technol, Dept Polymer Mat & Engn, Guangzhou 510640, Peoples R China
来源：
THERMOCHIMICA ACTA | 2009年 / 484卷 / 1-2期
基金：
中国国家自然科学基金;
关键词：
Polyamide; 6; Halloysite; Nanocomposite; Crystallization; Effective activation energy; Polymorphism; REINFORCED NYLON-6 COMPOSITES; WALLED CARBON NANOTUBES; NONISOTHERMAL CRYSTALLIZATION; ISOTHERMAL CRYSTALLIZATION; MECHANICAL-PROPERTIES; 6/MONTMORILLONITE NANOCOMPOSITES; ACTIVATION-ENERGY; MELTING BEHAVIOR; TEMPERATURE-DEPENDENCE; CRYSTAL COPOLYESTER;
D O I：
10.1016/j.tca.2008.12.003
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Non-isothermal crystallization and the polymorphism of the PA6 and the polyamide 6/halloysite nanotubes (PA6/HNTs) nanocomposites are studied by adopting differential scanning calorimetry (DSC) analysis, X-ray diffraction (XRD) analysis and polarized optical microscopy (POM) observations. HNTs act as nucleating agent and accelerate the crystallization. The kinetics analysis indicates that the fold-surface free energy of PA6/HNTs nanocomposites is larger than that of neat PA6. The increasing tendency of the fold-surface free energy of PA6/HNTs nanocomposites is restricted at higher HNTs loading. interestingly, the crystallinity of the PA6/HNTs nanocomposites increases with cooling rate. HNTs content is found to have a significant effect upon the crystallinity of the PA6/HNTs nanocomposites, and the crystallinity reaches its maximum with 5 phr of HNTs content. Moreover. the higher HNTs content is. the larger percentage gamma-phase crystals take up. The crystallization behavior of the PA6/HNTs nanocomposites is correlated with the multiple roles of HNTs in the crystallization of PA6. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：48 / 56
页数：9
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