Multifunctional polypropylene composites produced by incorporation of exfoliated graphite nanoplatelets

被引：489

作者：

Kalaitzidou, Kyriaki ^{[1
]}

Fukushima, Hiroyuki ^{[1
]}

Drzal, Lawrence T. ^{[1
]}

机构：

[1] Michigan State Univ, Dept Chem Engn & Mat Sci, Composite Mat & Struct Ctr, E Lansing, MI 48823 USA

来源：

CARBON | 2007年 / 45卷 / 07期

基金：

美国国家航空航天局;

关键词：

D O I：

10.1016/j.carbon.2007.03.029

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The potential of using exfoliated graphite nanoplatelets, xGnP (TM), as a reinforcement that can produce multifunctional polymer composites was explored. xGnP-polypropylene (PP) composites fabricated by melt mixing using a twin-screw extruder followed by injection molding were investigated for their thermal, viscoelastic and barrier properties as a function of xGnP concentration and aspect ratio. These properties of the xGnP-PP composites were compared to the properties of composites made with PAN-based carbon fibers, VGCF, carbon black and nanoclay. Results indicate that when oriented properly, the xGnP will not only stiffen the composite but also reduce the coefficient of thermal expansion in two directions rather than in one as in the case of aligned fiber composites. Furthermore, the large aspect ratio of xGnP, even at low loadings, increases the oxygen barrier of PP at least as effectively as the commonly used nanoclays and finally, addition of xGnP significantly enhances the thermal conductivity of the polymer matrix. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：1446 / 1452

页数：7