MICROCOMPOSITE SYSTEMS BY IN-SITU FORMATION OF LIQUID-CRYSTAL POLYMERS IN COMMODITY POLYMERS

In-situ formation of polyimide was carried out in solution of copolyme rs derived from styrene and 4-vinylpyridine. The in-situ formed polyam ic acid formed a strong hydrogen-bonding with pyridine moiety of the c opolymers, resulting in homogeneous solutions. Cast films obtained fro m the solutions were clear and transparent without phase separations, and mechanical properties of the films were much stronger than those o f films from the original copolymers. Insitu polymerization of acrylam ide in poly(styrene) was carried out by anionic polymerization to form Nylon 3 which was dispersed in poly(styrene) as fine particles,and me chanical properties of the poly(styrene) were greatly improved.