OLEFIN BLOCK COPOLYMER

摘要

PURPOSE: An olefin block copolymer is provided to show improved heat resistance and elasticity and simplify manufacturing processes. CONSTITUTION: An olefin block copolymer comprises an ethylene based or propylene based recurring unit, and a plurality of blocks or segments including α-olefin based recurring units having different mole fractions and polymer chains including 20-100 short chain branching per 1000 carbons. A point in which a value for primary differentiating Y which is number of branch chains per 1000 carbons of each polymer chain about X which is molecular weight of each polymer chain becomes 0 is existed between the minimum and maximum values of molecular weight X.