In situ polymerization and characterization of polyester-based polyurethane/nano-silica composites

被引：50

作者：

Chen, XC ^{[1
]}

Wu, LM ^{[1
]}

Zhou, SX ^{[1
]}

You, B ^{[1
]}

机构：

[1] Fudan Univ, Dept Mat Sci, Shanghai 200433, Peoples R China

来源：

POLYMER INTERNATIONAL | 2003年 / 52卷 / 06期

关键词：

polyester-based polyurethane; fumed nano-silica; nanocomposite coating;

D O I：

10.1002/pi.1176

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Polyester-based polyurethane/nano-silica composites were obtained via in situ polymerization and investigated by Fourier-transform infrared spectroscopy (FTIR), or FTIR coupled with attenuated total reflectance (FTIR-ATR), Transmission electron microscopy (TEM), atomic force microscopy (AFM), an Instron testing machine, dynamic mechanical analysis (DMA) and ultraviolet-visible spectrophotometry (UV-vis). FTIR analysis showed that in situ polymerization provoked some chemical reactions between polyester molecules and nano-silica particles. FTIR-ATR, TEM and AFM analyses showed that both surface and interface contained nano-silica particles. Instron testing and DMA data showed that introducing nano-silica particles into polyurethane enhanced the hardness, glass temperature and adhesion strength of polyurethane to the substrate, but also increased the resin viscosity. UV-vis spectrophotometry showed that nano-silica obtained by the fumed method did not shield UV radiation in polyurethane films. (C) 2003 Society of Chemical Industry.

引用

页码：993 / 998

页数：6

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