Aromatic heterocyclic polymer alloys and products produced therefrom

Claim 1

A polymeric alloy comprising a mixture of a flexible, coil-like heterocyclic polymer and a reinforcing amount of a rod-like aromatic heterocyclic polymer, the coil-like heterocyclic polymer consisting essentially of repeating units having the following structural formulas: ##STR7## wherein X is NH, Nφ, O or S, where φ is phenyl, Ar' is ##STR8## and m is an integer having a value such that the polymer has an intrinsic viscosity of about 2 to 20 dl/g as determined in methanesulfonic acid at 30° C., and the rod-like aromatic heterocyclic polymer consisting essentially of repeating units having the following formulas: ##STR9## where X is NH, Nφ, O or S, where φ is phenyl, Ar is ##STR10## and n is an integer having a value such that the polymer has an intrinsic viscosity of about 5 to 30 dl/g as determined in methanesulfonic acid at 30° C.

Claim 10

A method for preparing a composite film which comprises the steps of: a. dissolving in methanesulfonic acid solvent a mixture of a flexible, coil-like amorphous heterocyclic polymer and a para ordered, rod-like aromatic heterocyclic polymer, the amount of polymers dissolved being sufficient to provide a 1 to 30 percent solution of the polymer mixture in the solvent and the polymer mixture containing about 5 to 50 weight percent of the rod-like polymer, the coil-like heterocyclic polymer consisting essentially of repeating units having the following structural formulas: ##STR23## wherein X is NH, Nφ, O or S, where φ is phenyl, Ar' is ##STR24## and m is an integer having a value such that the polymer has an intrinsic viscosity of about 2 to 20 dl/g as determined in methanesulfonic acid at 30° C., and the rod-like aromatic heterocyclic polymer consisting essentially of repeating units having the following structural formulas: ##STR25## where X is NH, Nφ, O or S, where φ is phenyl, Ar is ##STR26## and n is an integer a value such that the polymer has an intrinsic viscosity of about 5 to 30 dl/g as determined in methanesulfonic acid at 30° C. b. introducing the polymer solution into a casting mold; c. removing solvent from the polymer solution, thereby forming a composite film in the mold; d. recovering the composite film from the mold; and e. drying the recovered composite film.

Claim 11

A method for preparing a composite film which comprises the steps of: a. dissolving in methanesulfonic acid solvent a mixture of a flexible, coil-like amorphous heterocyclic polymer and a para ordered, rod-like aromatic heterocyclic polymer, the amount of polymers dissolved being sufficient to provide a 1 to 30 percent solution of the polymer mixture in the solvent and the polymer mixture containing about 5 to 50 weight percent of the rod-like polymer, the coil-like heterocyclic polymer consisting essentially of repeating units having the following structural formulas: ##STR23## wherein X is NH, Nφ, O or S, where φ is phenyl, Ar' is ##STR24## and m is an integer having a value such that the polymer has an intrinsic viscosity of about 2 to 20 dl/g as determined in methanesulfonic acid at 30° C., and the rod-like aromatic heterocyclic polymer consisting essentially of repeating units having the following structural formulas: ##STR25## where X is NH, Nφ, O or S, where φ is phenyl, Ar is ##STR26## and n is an integer a value such that the polymer has an intrinsic viscosity of about 5 to 30 dl/g as determined in methanesulfonic acid at 30° C. b. introducing the polymer solution into a casting mold; c. removing solvent from the polymer solution, thereby forming a composite film in the mold; d. recovering the composite film from the mold; and e. drying the recovered composite film.