EFFECT OF INTERFACIAL ENERGY AND VISCOSITY ON PERCOLATION TIME OF CARBON BLACK-FILLED POLY(METHYL METHACRYLATE)

被引:36
作者
ASAI, S
SUMITA, M
机构
[1] Department of Organic and Polymeric Materials, Tokyo Institute of Technology, Ookayama Meguro-ku
来源
JOURNAL OF MACROMOLECULAR SCIENCE-PHYSICS | 1995年 / B34卷 / 03期
关键词
D O I
10.1080/00222349508215536
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 dispersion state of carbon black (CB) particles in a polymeric matrix was found to be affected by such factors as interfacial energy of the CB-polymer interface and the melt viscosity of matrix polymers. At a given CB volume fraction, the electrical conductivity of CB-filled poly(methyl methacrylate) (PMMA) was measured as a function of time at a temperature higher than the glass transition temperature (T-g). At a characteristic time, as a result of the aggregation of CB, networks facilitating electrical conduction were formed and a percolation-like transition was observed. We defined this characteristic time as the percolation time (t(p)) and estimated the dispersion state of particles by the t(p). The effects of interfacial energy of the CB-polymer interface and melt viscosity of the matrix were estimated quantitatively by changing the surface energy of CB and the temperature. The experimental values of t(p) were compared to the calculated values using a simple model. The percolation time decreased with increase of interfacial energy and CB content, and increased with the matrix viscosity. The model well explains the dependency as long as the volume fraction of CB is not large and matrix viscosity is neither very small nor very large.
引用
收藏
页码:283 / 294
页数:12
相关论文
共 15 条
[1]  
ASAI S, 1991, NIPPON KAGAKU KAISHI, V12, P1672
[2]  
BUCHE F, 1972, J APPL PHYS, V43, P4837
[4]  
CHAN RKS, 1970, J COLLOID INTERF SCI, V32, P299
[5]  
GURLAND J, 1966, T METALL SOC AIME, V236, P642
[6]   A REINTERPRETATION OF ORGANIC LIQUID-POLYTETRAFLUOROETHYLENE SURFACE INTERACTIONS [J].
KAELBLE, DH ;
UY, KC .
JOURNAL OF ADHESION, 1970, 2 :50-&
[7]   INFLUENCE OF PARTICLE SIZE ON ELECTRICAL RESISTIVITY OF COMPACTED MIXTURES OF POLYMERIC AND METALLIC POWDERS [J].
MALLIARIS, A ;
TURNER, DT .
JOURNAL OF APPLIED PHYSICS, 1971, 42 (02) :614-+
[8]   ELECTRICAL-CONDUCTIVITY OF CARBON POLYMER COMPOSITES AS A FUNCTION OF CARBON CONTENT [J].
MIYASAKA, K ;
WATANABE, K ;
JOJIMA, E ;
AIDA, H ;
SUMITA, M ;
ISHIKAWA, K .
JOURNAL OF MATERIALS SCIENCE, 1982, 17 (06) :1610-1616
[9]  
Owens D. K., 1969, J APPL POLYM SCI, V13, P1941
[10]   SOME THERMODYNAMIC ASPECTS OF POLYMER ADHESION [J].
OWENS, DK .
JOURNAL OF APPLIED POLYMER SCIENCE, 1970, 14 (07) :1725-&