Fracture behavior of α-zirconium phosphate-based epoxy nanocomposites

被引：106
作者：
Sue, HJ [1 ]
Gam, KT
Bestaoui, N
Clearfield, A
Miyamoto, M
Miyatake, N
机构：
[1] Texas A&M Univ, Dept Engn Mech, College Stn, TX 77843 USA
[2] Texas A&M Univ, Dept Chem, College Stn, TX 77843 USA
[3] Kaneka Texas Corp, Pasadena, TX 77507 USA
来源：
ACTA MATERIALIA | 2004年 / 52卷 / 08期
基金：
美国国家科学基金会;
关键词：
alpha-zirconium phosphate; epoxy nanocomposites; exfoliation; rubber-toughening; toughening mechanisms;
D O I：
10.1016/j.actamat.2004.01.015
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The fracture behaviors of alpha-zirconium phosphate (alpha-ZrP) based epoxy nanocomposites, with and without core-shell rubber (CSR) toughening, were investigated. The state of exfoliation and dispersion of a-ZrP nanofiller in epoxy were characterized using X-ray scattering and various microscopy tools. The level of enhancement in storage moduli of epoxy nanocomposite against neat epoxy is found to depend on the state of exfoliation of a-ZrP as well as the damping characteristics of the epoxy matrix. The fracture process in epoxy nanocomposite is dominated by preferred crack propagation along the weak intercalated alpha-ZrP interfaces, and the presence of alpha-ZrP does not alter the fracture toughness of the epoxy matrix. However, the toughening using CSR can significantly improve the fracture toughness of the nanocomposite. The fracture mechanisms responsible for such a toughening effect in CSR-toughened epoxy nanocomposite are rubber particle cavitation, followed by shear banding of epoxy matrix. The ductility and toughenability of epoxy do not appear to be affected by the incorporation of alpha-ZrP. Approaches for producing toughened high performance polymer nanocomposites are discussed. (C) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：2239 / 2250
页数：12
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