Controlling the thermornechanical properties of polymer nanocomposites by tailoring the polymer-particle interface

被引:180
作者
Bansal, Amitabh
Yang, Hoichang
Li, Chunzhao
Benicewicz, Rian C.
Kumar, Sanat K.
Schadler, Linda S.
机构
[1] Rensselaer Polytech Inst, Rensselaer Nanotechnol Ctr, Troy, NY 12180 USA
[2] Rensselaer Polytech Inst, Dept Chem & Biol Chem, Troy, NY 12180 USA
[3] Rensselaer Polytech Inst, Dept Chem & Biol Engn, Troy, NY 12180 USA
[4] Rensselaer Polytech Inst, Dept Mat Sci & Engn, Troy, NY 12180 USA
关键词
blending; glass transition; nanocomposites; reinforcement;
D O I
10.1002/polb.20926
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
We show that the thermomechanical properties of polymer nanocomposites are critically affected by polymer-particle wetting behavior. Silica nanoparticles grafted with dense polystyrene brushes of degree of polymerization 1050 are blended with polystyrene melts to form nanocomposites. It was found that low molecular weight (MW) polystyrene melts with lengths < 880 wet these particles. Concurrently, the glass transition temperature (T-g) of the nanocomposite increases. At higher MW, the matrix does not wet the particles and the T-g decreases. (c) 2006 Wiley Periodicals, Inc.
引用
收藏
页码:2944 / 2950
页数:7
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