Journal
ADVANCED COMPOSITE MATERIALS
Volume 27, Issue 4, Pages 349-365Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/09243046.2017.1384143
Keywords
hybridisation; graphene composites; electrical conductivity; ultimate tensile strength; statistical analysis; morphology; sub-set optimisation
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This article focuses on the optimisation of electrical and mechanical properties of hybrid blends of polyoxymethylene (POM) as primary thermoplastic matrix, polypyrrole (PPY) as secondary conducting polymer and graphene (G) as reinforcement. An initial Taguchi analysis was performed with a focus on improving electrical conductivity (sigma) and tensile strength. A mixture analysis using simplex' statistical design was applied to develop an experimental subset that identified an optimal combination in weight-percentage. Both electrical and mechanical properties were improved by the addition of PPY and graphene particles due to hybridisation mechanism as well as double percolation threshold. The maximum electrical conductivity of 0.95Scm(-1) was achieved with POM reinforced with 3wt.% of G and 2.5wt.% of PPY loading. The mechanical properties were found to be increased with increase in addition of both G and PPY.
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