Mechanistic investigation of the preparation of polymer/ceramic nanocomposites

被引:29
作者
Gonsalves, KE
Chen, XH
Baraton, MI
机构
[1] UNIV CONNECTICUT,DEPT CHEM,STORRS,CT 06269
[2] UNIV LIMOGES,LMCTS,CNRS,URA 320,F-87060 LIMOGES,FRANCE
来源
NANOSTRUCTURED MATERIALS | 1997年 / 9卷 / 1-8期
关键词
D O I
10.1016/S0965-9773(97)00048-2
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Polyimide/aluminum nitride (AIN) nanocomposites with very high packing density were obtained through an efficient solution mixing method. The homogeneous composites showed a trend of decreasing thermal expansion, and increasing hardness and Young's modulus, as the ceramic loading increased. A detailed investigation of the preparation process, via in-situ FT-IR analysis of a series of probe molecule reactions on the particle surface, suggested a strong chemisorption of amide groups on the nanoparticle surface. Therefore, a reaction mechanism for the chemisorption is proposed. Considering the structural similarity of the probe molecules and poly(amic acid), a precursor to polyimide, indications are that (I)chemisorption plays an important role for mixing processing of a nanoparticle/organic medium; and (2) amide group adsorption is one of the most efficient interaction during the suspension processing for the chemically synthesized nanostructured AlN powders. (C) 1997 Acta Metallurgica Inc.
引用
收藏
页码:181 / 184
页数:4
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