Thermal conductivity of carbon fiber/liquid crystal polymer composites
Document Type
Article
Publication Date
12-15-2006
Department
Department of Chemical Engineering
Abstract
Thermally conductive resins are needed for bipolar plates in fuel cells. Currently, the materials used for these bipolar plates often contain a single type of graphite in a thermosetting resin. In this study, varying amounts of two different types of polyacrylonitrile based carbon fibers, Fortafil 243 and Panex 30, were added to a thermoplastic matrix (Vectra A950RX Liquid Crystal Polymer). The resulting single filler composites were tested for thermal conductivity and a simple exponential thermal conductivity model was developed for the square root of the product of the in-plane and through-plane thermal conductivity √kinkthru. The experiments showed that the through-plane thermal conductivity was similar for composites up to 40 vol % fiber. However, at higher loadings, the Panex 30 samples exhibited higher thermal conductivity. The experiments also showed that the in-plane thermal conductivity of composites containing Panex 30 was higher than those containing Fortafil 243 for all volume fractions studied. Finally, the model agreed very well with experimental data covering a large range of filler volume fraction (from 0 to 55 vol % for both single filler systems). The model can be used with existing through-plane thermal conductivity models to predict in-plane thermal conductivity.
Publication Title
Journal of Applied Polymer Science
Recommended Citation
Keith, J.,
King, J. A.,
Miller, M.,
&
Tomson, A.
(2006).
Thermal conductivity of carbon fiber/liquid crystal polymer composites.
Journal of Applied Polymer Science,
102(6), 5456-5462.
http://doi.org/10.1002/app.25102
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/3513