Measurement of anisotropic thermal conductivity of single fibre

Abstract

Separate measuring heads for longitudinal conductivity measurements and for transverse conductivity measurements are shown in diagrams. The two methods were tested by using an isotropic isoprene rubber vulcanizate. Results of thermal conductivity along and across fibres are given in a table which lists carbon fibre, Kevlar 49, cotton, linen, E-glass, rayon filament, silk, nylon, rayon staple, polyester filament, polyester staple, acrylic, and wool fibres. In biaxially-drawn polystyrene film the conductivities are related to draw ratio.