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Thermal conductivity models for single and multiple filler carbon/liquid crystal polymer composites
Author(s) -
Hauser Rebecca A.,
Keith Jason M.,
King Julia A.,
Holdren Jennifer L.
Publication year - 2008
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.28869
Subject(s) - composite material , materials science , thermal conductivity , graphite , filler (materials) , composite number , fiber , polymer , carbon fibers
In this study, two different carbon fillers (Thermocarb TC‐300 synthetic graphite and Fortafil 243 carbon fiber) were added to Vectra A950RX liquid crystal polymer to produce single filler composites with filler concentrations of up to 80 wt % (71.4 vol %) and multiple filler composites that contained varying concentrations of both synthetic graphite and carbon fiber. The through‐plane and in‐plane thermal conductivity for each formulation was measured. For the single filler synthetic graphite and carbon fiber composites, the Nielsen model was applied to the experimental through‐plane thermal conductivity data. The parameters obtained from the single filler models were then used along with a variation of the original Nielsen model to predict the through‐plane thermal conductivities of the multiple filler composites. In‐plane thermal conductivity models were also developed using a correlation involving the square root of the product of the composite in‐plane and through‐plane thermal conductivities. This model was applied to the single filler synthetic graphite and carbon fiber composites. A variation of this model was then used to predict the in‐plane thermal conductivity for composites containing both fillers. All the models presented in this work showed good agreement with experimental data. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008