Viscoelastic properties of carbon black suspension as a flocculated percolation system

被引：29

作者：

Amari, T ^{[1
]}

Uesugi, K ^{[1
]}

Suzuki, H ^{[1
]}

机构：

[1] FURUKAWA ELECT CORP LTD, ICHIHARA 290, JAPAN

来源：

PROGRESS IN ORGANIC COATINGS | 1997年 / 31卷 / 1-2期

关键词：

suspension rheology; flocculated structure; percolation theory; scaling exponents; imaging analysis;

D O I：

10.1016/S0300-9440(97)00033-7

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Viscoelastic properties of the disperse system consisting of carbon black particles and ethylene vinyl acetate copolymer were investigated. The effect of carbon black contents on viscoelastic properties was mainly discussed with the aid of the percolation theory. The viscoelastic properties of the molten state suspension depend on the three-dimensional flocculated structure formed by carbon black particles. However, in the solid state, the dominant factor affecting the viscoelastic properties of the composite is not the flocculated structure but the viscoelasticity of disperse medium. The expansion of the flocculated network structure formed by dispersed particles was observed morphologically by electron microscope photograph with the aid of the digital image analysis technique and the fraction of the effective bonds which belong to the infinite network was calculated. Using the percolation probability parameter determined morphologically, the modulus at small strain amplitude can be predicted quantitatively by the bond percolation theory for a lattice percolation model corresponding to purely isotropic force. (C) 1997 Elsevier Science S.A.

引用

页码：171 / 178

页数：8

共 25 条

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