Characteristics of polyvinylpyrrolidone-layered silicate nanocomposites prepared by attrition ball milling

被引：91
作者：
Koo, CM [1 ]
Ham, HT [1 ]
Choi, MH [1 ]
Kim, SO [1 ]
Chung, IJ [1 ]
机构：
[1] Korea Adv Inst Sci & Technol, Dept Chem & Biomol Engn, Yusong Gu, Taejon 305701, South Korea
来源：
POLYMER | 2003年 / 44卷 / 03期
关键词：
polyvinylpyrrolidone nanocomposites; hydrogen bonding; optical anisotropy;
D O I：
10.1016/S0032-3861(02)00803-0
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Polyvinylpyrrolidone (PVP)/sodium montmorillonite (MMT) nanocomposites prepared via the solution intercalation method were investigated by UV/vis, SEM, X-ray diffraction, TEM, FT-IR and PLM (polarized light microscopy). PVP/MMT nanocomposites show exfoliation below 20 wt% MMT and intercalation above this concentration. Nanocomposites retain good optical clarity and increased thermal resistance with MMT content. The compatibility between PVP and MMT and their enhanced properties may be explained by hydrogen bonding interactions. In addition, the nanocomposites prepared under more rigorous mixing conditions show better transparency because the smaller particle sizes are induced. In addition, the study on optically clear PVP/MMT suspensions helps one to understand how optical anisotropy of MMT is affected by the existence of polymer in. aqueous solution. (C) 2002 Elsevier Science Ltd. All rights reserved.
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页码：681 / 689
页数：9
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