Conductivity of Poly(methyl methacrylate)/Polystyrene/Carbon Black and Poly(ethyl methacrylate)/Polystyrene/Carbon Black Ternary Composite Films  

作　　者：Hua-Gen Xu Mu-Chao Qu Ya-Min Pan Dirk WSchubert 

机构地区：[1]Institute of Polymer Materials,Friedrich-Alexander-University Erlangen-Nuremberg,Martensstr.7,91058 Erlangen,Germany [2]College of Materials Science and Engineering,The Key Laboratory of Material Processing and Mold of Ministry of Education,Zhengzhou University,Zhengzhou 450002,China [3]Bavarian Polymer Institute,Dr.Mack-Strasse 77,90762 Fiirth,Germany

出　　处：《Chinese Journal of Polymer Science》2020年第3期288-297,I0007,共11页高分子科学（英文版）

基　　金：the China Scholarship Council for funding a scholarship

摘　　要：Poly(methyl methacrylate)(PMMA)/polystyrene(PS)/carbon black(CB)and poly(ethyl methacrylate)(PEMA)/PS/CB ternary composite films were obtained using solution casting technique to investigate double percolation effect.In both PMMA/PS/CB and PEMA/PS/CB ternary composite films,the CB particles prefer to locate into PS phase based on the results of calculating wetting coefficient,which is also confirmed by SEM images.The conductivity of the films was investigated,and the percolation threshold(￠c)of both ternary composite films with different polymer blend ratios was determined by fitting the McLachlan GEM equation.Conductivity of PMMA/PS/CB ternary composite films showed a typical double percolation effect.However,due to the double emulsion structure of PEMA/PS polymer blends,the PEMA/PS/CB ternary composite films(PEMA/PS=50/50)showed a higher￠c,even CB only located in PS phase,which conflicts with the double percolation effect.A schematic diagram combined with SEM images was proposed to explain this phenomenon.Poly(methyl methacrylate)(PMMA)/polystyrene(PS)/carbon black(CB) and poly(ethyl methacrylate)(PEMA)/PS/CB ternary composite films were obtained using solution casting technique to investigate double percolation effect. In both PMMA/PS/CB and PEMA/PS/CB ternary composite films, the CB particles prefer to locate into PS phase based on the results of calculating wetting coefficient, which is also confirmed by SEM images. The conductivity of the films was investigated, and the percolation threshold(￠c) of both ternary composite films with different polymer blend ratios was determined by fitting the McLachlan GEM equation. Conductivity of PMMA/PS/CB ternary composite films showed a typical double percolation effect. However, due to the double emulsion structure of PEMA/PS polymer blends, the PEMA/PS/CB ternary composite films(PEMA/PS = 50/50) showed a higher ￠c, even CB only located in PS phase, which conflicts with the double percolation effect. A schematic diagram combined with SEM images was proposed to explain this phenomenon.

关 键 词：Double percolation effect CONDUCTIVITY Ternary composite films Compatibility 

分 类 号：TB332[一般工业技术—材料科学与工程]