GRAFT COPOLYMER OF POLYLACTONE ON A POLYMER BACKBONE

摘要

The impact strength of engineering resins may be improved by blending them with a graft copolymer, which copolymer comprises a continuous phase of an amorphous or semi-crystalline polymer backbone which incorporates or on which are grafted unsaturated dicarboxylic acid anhydride groups, and discontinuous phase polylactone whose repeat unit chain lengtn contains 5 to 7 carbon atoms, which polylactone is attached to the backbone via the anhydride groups.