Thermotropic liquid crystal polymers for engineering applications

Abstract

It is relatively recently that thermotropic liquid crystal polymers for load bearing applications have become commercially available. These materials possess good mechanical properties and excellent processability and are intended for use at elevated temperatures in harsh chemical environments. In this paper, the phenomenon of liquid crystallinity is described and the way in which it improves the mechanical properties and processability of polymers is explained. The synthetic strategies involved in obtaining nematic mesophases in polyesters are discussed fully, particularly those involved in the synthesis of commercially available materials. The future of these new types of engineering thermoplastic will depend on cost and on the appropriate application of the unique properties they offer.

MST/875