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Download fileMaterial property models for polyethylene-based conductive blends suitable for PEM fuel cell bipolar plates
journal contribution
posted on 2016-04-21, 12:17 authored by Paul S. Greenwood, Rob Thring, Rui ChenElectrical and thermal conductivity models from Mamunya et al and Kerner’s equation for
elastic and flexural modulus have been applied to experimental data to assess model
accuracies. Experimental data was gained from a previous study where polyethylene and
carbon black, graphite and magnetite composites produced by injection and compression moulding were tested. The electrical conductivity modelling gave accurate fits to the data, though available data was limited and the thermal conductivity modelling produced good fits
with R2 values greater than 0.93. The electrical and thermal model exponents were tuned for best fit and used to compare the modelling results with the literature and gain information about conduction mechanisms such as tunnelling and links, nodes and blobs and variations in local filler concentrations. A modified Kerner’s equation to effectively allow for filler type
and variations in composite processing was used to improve upon the original equation which modelled modulus behaviour based on the pure matrix. The new equation proved to be a better predictor of elastic modulus than flexural modulus.
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- Aeronautical, Automotive, Chemical and Materials Engineering
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- Aeronautical and Automotive Engineering