Processing-microstructure-property relationship in conductive polymer nanocomposites

被引:65
作者
Al-Saleh, Mohammed H. [2 ]
Sundararaj, Uttandaraman [1 ,2 ]
机构
[1] Univ Calgary, Dept Chem & Petr Engn, Schulich Sch Engn, Calgary, AB T2N 1N4, Canada
[2] Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 2G6, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
Polymer nanocomposites; Processing-microstructure-property relationship; Nanofiller dispersion; CARBON NANOTUBE COMPOSITES; ELECTRICAL-CONDUCTIVITY; MECHANICAL-PROPERTIES; RHEOLOGICAL BEHAVIOR; SHIELDING EFFECTIVENESS; DENSITY POLYETHYLENE; EPOXY COMPOSITES; MELT RHEOLOGY; TEMPERATURE; BLENDS;
D O I
10.1016/j.polymer.2010.03.022
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
The processing-microstructure-property relationship in conductive polymer nanocomposites was investigated. Nanocomposites of vapor grown carbon nanofiber (VGCNF)/high density polyethylene (HDPE) with different levels of nanofiber dispersion were formulated by changing the nanocomposites' compounding temperature. Direct (SEM and optical microscopy) and indirect methods (linear viscoelastic properties) were used to characterize the dispersion of nanofiller. VGCNF aspect ratio before and after mixing was measured. Increasing processing temperature was found to increase the nanofiller agglomeration and reduce the breakage of nanofiller because of the decrease in the mixing shear stress and energy. The electrical and electromagnetic interference (EMI) shielding properties of the VGCNF/HDPE nanocomposites decreased with increase in processing temperature from 180 degrees C to 220 degrees C because the increase in the agglomeration of VGCNF was more significant than the preservation of the VGCNF aspect ratio. This finding does not mean that the increase in processing temperature will always lead to decrease in the electrical conductivity and EMI shielding properties for all polymer composites. For some composites, it is possible to preserve the filler aspect ratio enough so that the increase in agglomeration is less of a factor. (c) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码:2740 / 2747
页数:8
相关论文
共 30 条
[1]   Electromagnetic interference (EMI) shielding effectiveness of PP/PS polymer blends containing high structure carbon black [J].
Al-Saleh, Mohammed H. ;
Sundararaj, Uttandaraman .
MACROMOLECULAR MATERIALS AND ENGINEERING, 2008, 293 (07) :621-630
[2]   Electrically conductive carbon nanofiber/polyethylene composite: effect of melt mixing conditions [J].
Al-Saleh, Mohammed H. ;
Sundararaj, Uttandaraman .
POLYMERS FOR ADVANCED TECHNOLOGIES, 2011, 22 (02) :246-253
[3]   A review of vapor grown carbon nanofiber/polymer conductive composites [J].
Al-Saleh, Mohammed H. ;
Sundararaj, Uttandaraman .
CARBON, 2009, 47 (01) :2-22
[4]  
[Anonymous], 1998, Rheol. Bull
[5]   Review of melt-processed nanocomposites based on EVOH/organoclay [J].
Artzi, N ;
Narkis, M ;
Siegmann, A .
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 2005, 43 (15) :1931-1943
[6]   A review and analysis of electrical percolation in carbon nanotube polymer composites [J].
Bauhofer, Wolfgang ;
Kovacs, Josef Z. .
COMPOSITES SCIENCE AND TECHNOLOGY, 2009, 69 (10) :1486-1498
[7]   Very low conductivity threshold in bulk isotropic single-walled carbon nanotube-epoxy composites [J].
Bryning, MB ;
Islam, MF ;
Kikkawa, JM ;
Yodh, AG .
ADVANCED MATERIALS, 2005, 17 (09) :1186-+
[8]   Ethylene-Acrylic Acid Copolymer Induced Electrical Conductivity Improvements and Dynamic Rheological Behavior Changes of Polypropylene/Carbon Black Composites [J].
Chen, Guangshun ;
Yang, Bo ;
Guo, Shaoyun .
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 2009, 47 (18) :1762-1771
[9]   Processing conditions for electromagnetic interference shielding effectiveness and mechanical properties of acrylonitrile-butadiene-styrene based composites [J].
Chiang, WY ;
Cheng, KY .
POLYMER COMPOSITES, 1997, 18 (06) :748-756
[10]   RHEOLOGICAL BEHAVIOR OF POLYMER BLENDS [J].
CHUANG, HK ;
HAN, CD .
JOURNAL OF APPLIED POLYMER SCIENCE, 1984, 29 (06) :2205-2229