Preparation and Characterization of Scratch and Mar Resistant Waterborne Epoxy/Silica Nanocomposite Clearcoat

被引：38
作者：
Chen, Songwei
You, Bo [1 ]
Zhou, Shuxue
Wu, Limin
机构：
[1] Fudan Univ, Dept Mat Sci, Shanghai 200433, Peoples R China
来源：
JOURNAL OF APPLIED POLYMER SCIENCE | 2009年 / 112卷 / 06期
关键词：
blending; epoxy coatings; silica; nanocomposites; scratch resistance; CURED EPOXY-ACRYLATE; MECHANICAL-PROPERTIES; HYBRID COATINGS; PARTICLES; BEHAVIOR; FILMS; POLYCARBONATE; AFM;
D O I：
10.1002/app.29865
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Colloidal nano-silica particles were used to improve the scratch and mar resistance of waterborne epoxy coatings by directly blending. To enhance the compatibility of nano-silica particles within polymer matrix, nano-silica particles were first modified with 3-glycidoxy-propyl-trimethoxysilane (GPTMS) and characterized by Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), and transmission electron microscopy (TEM). The modified nano-silica particles were found to have a better dispersion and compatibility in the polymer matrix than the unmodified nano-silica particles. Macro-scratch and nano-scratch testers were employed to characterize the scratch and mar resistances of the nanosilica-reinforced epoxy coatings. Relative to unmodified nano-silica, GPTMS-modified nano-silica particles can improve the scratch and mar resistance more significantly and reduce the transparency and gloss of waterborne epoxy coatings less seriously. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 112: 3634-3639, 2009
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页码：3634 / 3639
页数：6
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