Preparation of the polymer-clay nanocomposites in exfoliated state by interface stabilization

被引:12
作者
Lee, SS [1 ]
Kim, J [1 ]
机构
[1] Korea Inst Sci & Technol, Polymer Hybrids Res Ctr, Seoul 136791, South Korea
关键词
nanocomposites; compatibilization; clay; exfoliation;
D O I
10.1002/polb.10635
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
To suppress the repulsive interfacial energy between hydrophilic clay and a hydrophobic polymer matrix for polymer-clay nanocomposites, a third component of amphiphilic nature such as poly(epsilon-caprolactone) (PCL) was introduced into the styrene-acrylonitrile copolymers (SAN)/Na-montmorillonite system. Once epsilon-caprolactone was polymerized in the presence of Na-montmorillonite, the successful ring-opening polymerization of epsilon-caprolactone and the well-developed exfoliated structure of PCL/Na-montmorillonite mixture were confirmed. Thereafter, SAN was melt-mixed with PCL/Na-montmorillonite nanocomposite, and the SAN matrix and PCL fraction were completely miscible to form a homogeneous mixture with retention of the exfoliated state of Na-montmorillonite, exhibiting that PCL effectively stabilizes the repulsive polymer-clay interface and contributes to the improvement of the mechanical properties of nanocomposites. (C) 2003 Wiley Periodicals, Inc.
引用
收藏
页码:246 / 252
页数:7
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