Melt processable thermotropic aromatic copolyesters

摘要

The invention relates to a class of copolymers capable of forming an optically anisotropic melt comprising recurring structural units (a) independently each occurrence selected from the group consisting of Formula I; recurring structural units (b) independently each occurrence selected from the group consisting of Formulas II and III; recurring structural units (c) independently each occurrence selected from the group consisting of Formula IV and optionally recurring structural units (d) independently each occurrence selected from the group consisting of Formula V: <IMAGE> I <IMAGE> II <IMAGE> III <IMAGE> IV <IMAGE> V wherein R independently each occurrence is a chemically inert substituent.