Title: THERMAL CONDUCTIVITY OF NEEDLE PUNCHED PREFORMS MADE OF CARBON AND OXIPAN FIBRES
Page Range: p.83-92
Author(s): Jae Yeol Lee; Tae Jin Kang
File size: 185K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 13
Issue No: No. 1
Abstract
The thermal conductivity of preforms made by a needle punching technique was measured using a tailor-made apparatus. Measurements were carried out in the absence of the matrix resin to find the thermal conductivity of the preforms themselves. The preforms were made with a variety of material compositions and textile structures, and various needle punching densities. Preforms made of woven fabric are reported to have shown higher thermal conductivity than those of felt fabric. It was also shown that needle punching density had a strong influence on the thermal conductivity. An increase in the needle punching density decreased the thermal conductivity along the in-plane direction, and increased it along through-the-thickness direction. An analytical model for thermal conduction in both directions was devised, and the results were seen to be consistent with those achieved experimentally. The thermal conductivity of the rearranged fibres in the punching hole was estimated by parametric studies. 20 refs.
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