Abstract

Abstract Acrylic monofilament fibres have been experimentally prepared using a semi-melt spinning technique to give control of surface and internal irregularities, or flaws, normally observed in commercial acrylic fibres. Smooth surface, round fibre has been prepared with an extremely low concentration of internal voids and with a wide range of concentrations of internal particulate flaws. The importance of the internal particulate irregularities in initiating tensile fracture after pyrolysis of acrylic fibre is indicated by carbon fibre fractography.

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