Electrical conductivity under shear flow of molten polyethylene filled with carbon nanotubes: Experimental and modeling,Polymer Engineering and Science

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Electrical conductivity under shear flow of molten polyethylene filled with carbon nanotubes: Experimental and modeling
Polymer Engineering and Science ( IF 3.2 ) Pub Date : 2021-01-31 , DOI: 10.1002/pen.25651
Anatole Collet ₁ , Anatoli Serghei ₁ , Olivier Lhost ₂ , Yves Trolez ₂ , Philippe Cassagnau ₁ , René Fulchiron ₁

Affiliation

This work aims to describe the conductivity evolution of polymer composites (polyethylene filled with carbon nanotubes) during a shearing deformation. Rheo‐electric measurements were carried out to observe the shear‐induced fillers network modification. Extended steady shear forces the conductivity to evolve asymptotically to a steady level attesting to an equilibrium between structuring and break up mechanisms in the melted polymer. Numerous experiments were conducted to cover a wide range of shear rate from 0.05 to 10 s⁻¹ and for carbon nanotubes concentrations between 1.3 and 2.9 vol%. A model is proposed to predict the conductivity evolution under shear deformation using a simple kinetic equation inserted in a percolation law. Structuring parameter was found to be solely dependent on the temperature whereas shear induced modification terms were found to be mostly driven by the shear rate and the fillers content.

中文翻译：

填充有碳纳米管的熔融聚乙烯剪切流下的电导率：实验和建模

这项工作旨在描述剪切变形过程中聚合物复合材料（填充有碳纳米管的聚乙烯）的电导率演变。进行流变电学测量以观察剪切诱导的填料网络的变化。扩展的稳态剪切力迫使电导率渐进地发展到稳态水平，这证明了熔融聚合物中结构化和分解机理之间的平衡。进行了大量实验以涵盖从0.05到10 s ^-1的广泛剪切速率碳纳米管的浓度在1.3至2.9％（体积）之间。提出了一个模型，使用渗流定律中插入的简单动力学方程预测剪切变形下的电导率演化。发现结构参数仅取决于温度，而发现剪切诱导的改性项主要由剪切速率和填料含量驱动。

更新日期：2021-04-09

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