Abstract
-- The high degree of polymer order in LC solutions and melts predetermines the preparation of high-strength fibres and yarns based on them. -- High-strength yarns from LC solutions of PPTA are produced on an industrial scale (Kevlar and Tveron) and on a pilot-plant scale (Terlon). -- The preparation of high-strength yarns based on LC thermotropic copolyesters is a promising trend from the point of view of an economical and ecologically clean method of spinning from the melt. -- Experimental and pilot-plant units are being developed for the preparation of such fibres at present. -- Ultrahigh-modulus yarns of the PVZ type for low-tonnage purposes present much interest for the development of new composite materials for contemporary aerospace technology. -- Studies in the direction of increasing compressional strength of high-strength fibres based on rigid-chain LC polymers are promising.
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