Dispersion and network formation of graphene platelets in polystyrene composites and the resultant conductive properties

被引：54

作者：

Bai, Qi-qi ^{[1
]}

Wei, Xiao ^{[1
]}

Yang, Jing-hui ^{[1
]}

Zhang, Nan ^{[1
]}

Huang, Ting ^{[1
]}

Wang, Yong ^{[1
]}

Zhou, Zuo-wan ^{[1
]}

机构：

[1] Southwest Jiaotong Univ, Minist Educ, Key Lab Adv Technol Mat, Sch Mat Sci & Engn, Chengdu 610031, Peoples R China

来源：

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2017年 / 96卷

基金：

中国国家自然科学基金;

关键词：

Polymer-matrix composites (PMCs); Microstructures; Thermal properties; Rheology; ENHANCED THERMAL-CONDUCTIVITY; CARBON NANOTUBE FILLERS; POLYMER COMPOSITES; MECHANICAL-PROPERTIES; EPOXY COMPOSITES; ELECTRICAL-CONDUCTIVITY; SYNERGISTIC ENHANCEMENT; THEORETICAL APPROACH; INTERFACE MATERIALS; EXPANDED GRAPHITE;

D O I：

10.1016/j.compositesa.2017.02.020

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A small quantity of graphene platelets (GNPs) were introduced into polystyrene (PS) to prepare the PS/GNP composites through one-step process (solution compounding, PS/GNP-S) and two-step process (solution compounding and subsequent melt compounding, PS/GNP-SM). The dispersion states and microstructures of GNPs in the composites were comparatively investigated. The results demonstrated that the PS/GNP-S composites exhibited relatively poor dispersion of GNP particles but relatively high ability to form the percolated GNP network compared with the PS/GNP-SM composites. Apparently increased glass transition temperatures were achieved for the PS/GNP-S samples. Conductive properties measurements showed that the PS/GNP-S samples exhibited relatively low volume resistivity. Largely enhanced thermal conductivity was achieved for the PS/GNP-S samples, and the thermal conductivity exhibited nonlinear behavior with increasing GNP content, which was different from the linear behavior of the PS/GNP-SM samples. The conductive mechanisms of the composites were discussed using two different analytic models. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：89 / 98

页数：10

共 62 条

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