Anisotropic melt-forming polymer.

摘要

A polymer capable of forming an anisotropic melt characterised in that the polymer chain includes residues of cross-linking reactants at a concentration sufficient to give a polymer with a melt viscosity of not greater than 10<Sup>7</Sup> Nsec/m<Sup>2</Sup> measured by capillary rheometry at a shear rate of 10' N/m<Sup>2</Sup>. The polymers exhibit favourable shear dependent viscosity characteristics in that the viscosity is high under low shear conditions and is low under high shear conditions, as judged by the viscosity characteristics of polymers of the same composition but not containing the residues of cross-linking reactants.