Abstract: Granular compositions which comprise a block copolymer containing blocks of polybenzazole polymer and blocks of thermoplastic polymer can be compression molded to provide a molded article having physical properties superior to molded articles made from the thermoplastic polymer alone.

Abstract: A process for consolidating/molding a material made of (a) block copolymers of rigid or semi-rigid PBZ with thermoplastic polymers, (b) block copolymers of rigid PBZ with semi-rigid PBZ, (c) molecular composites of rigid or semi-rigid PBZ with thermoplastic polymers, (d) molecular composites of rigid or semi-rigid PBZ with non-rigid PBZ polymers or (e) semi-rigid PBZ polymers, whereby the material, in its substantially acid-free, wet coagulated state, and in the form of a plurality of films or film layers, filaments or fibers, powders or granules, film layers, filaments or particulate, is subjected to a first pressure P1 which is sufficient to provide a substantially void-free consolidated material upon molding. Heat and a second pressure P2 is then applied to the wet coagulated material in amounts sufficient to fuse the films or film layers, filaments or fibers, powders, or granules into a single entity.

Abstract: Granular compositions which comprise a block copolymer containing blocks of rigid rod polybenzazole polymer and blocks of thermoplastic polybenzazole polymer can be compression molded to provide a molded article having physical properties superior to molded articles made from the thermoplastic polymer alone.

Abstract: Block copolymers can be formed from heterocyclic polymers such as PBO and thermoplastic polymers such as polyamide or poly(aromatic ether ketone). The block copolymer compositions are thermoplastic and do not experiSTATEMENT OF GOVERNMENT INTERESTThis invention was made with Government support under contract F33615-86-C-5068 awarded by the Department of the Air Force. The Government has certain rights in this invention.

Abstract: Block copolymers can be formed from heterocyclic polymers such as PBO and thermoplastic polymers such as polyamide or poly(aromatic ether ketone). The block copolymer compositions are thermoplastic and do not experience substantial phase separation, even at about their glass transition temperature. The block copolymer compositions can be formed into fibers, films and laminate or compression-molded articles. PBO, PBI and PBT polymers terminated by active aromatic rings or acylating groups are particularly useful for making the block copolymers.

Abstract: Block copolymers can be formed from heterocyclic polymers such as PBO and thermopSTATEMENT OF GOVERNMENT INTERESTThis invention was made with Government support under contracts F49620-86-C-0057 and/or F33615-86-C-5068 awarded by the Department of the Air Force. The Government has certain rights in this invention.

Abstract: The present invention encompasses non-phase-separated thermoplastic block copolymers containing rigid rod PBZ blocks and thermoplastic PBZ blocks; dopes and compositions containing those block copolymers; a process for making shaped articles from thermoplastic block copolymers containing rigid rod PBZ blocks and thermoplastic PBZ blocks; and shaped articles made by that process.

Abstract: Block copolymers can be formed from heterocyclic polymers such as PBO and thermoplastic polymers such as pSTATEMENT OF GOVERNMENT INTERESTThis invention was made with Government support under contract F33615-86-C-5068 awarded by the Department of the Air Force. The Government has certain rights in this invention.

Abstract: Polymeric molecular composites at the molecular level that are analogous to chopped fiber composite comprising reinforcing rigid rod heterocyclic polymer dispersed in a thermoplastic polymer matrix are disclosed. A process for the preparation thereof and laminates comprised of plies of these composites are also disclosed.