TOUGHNESS OF SUPER OLEFIN POLYMER

Recently, the SOP (super olefin polymer) was developed by the establis hment of a new polymer morphology model for the PP/elastomer blend pol ymers, called ''elastomer matrix morphology''. Here the difference of toughening mechanism between SOP and EMT (elastomer modified thermopla stics) was studied by single extension measurements, three point bendi ng of U-notched bar measurements, and transmission electron microscope (TEM) observation. The high toughness revealed by SOP is attributed t o improved strength of the fibrils of the craze. The stable plastic de formation due to the some shear yielding bands is effective for the im provement of toughness in PP/elastomer blend polymers.