OLEFIN BLOCK COPOLYMER

摘要

The present invention relates to an olefin block copolymer having improved processability as well as excellent elasticity and heat resistance and a preparation method thereof. The olefin block copolymer comprises first and second segments which include an ethylene- or propylene-based repeating unit and an a-olefin-based repeating unit in a different molar fraction. In a TEM (transmission electron microscope) image, the olefin block copolymer is in a form where the second segment is dispersed on the first segment as a dispersed phase having a closed curve shape.