The Application of Liquid Crystal Polymer Properties

Abstract

Liquid crystal polymers offer a unique combination of properties to the end user. These typically include low melt viscosity, fast cycle times, moulding to tight tolerances, very low mould shrinkage/warpage/sinking, excellent mechanical properties, good solvent resistance, Low flammability, high continuous use temperature, excellent solder resistance, low thermal expansion, excellent barrier properties, and low water absorption. Some of these properties are exhibited by conventional amorphous polymers, others by conventional crystalline polymers, but only liquid crystal polymers can provide this complete range of advantages. Many of these properties are common to all liquid crystal polymers. Differences arise primarily in processing conditions, high temperature performance, mechanical properties and cost. Potential applications of liquid crystal polymers arise directly from this unique combination of properties. These include precision moulded small components, complex extrusion profiles, film exhibiting excellent barrier properties, high strength/modulus fibres, and novel composites.