OLEFIN-AROMATIC VINYL COMPOUND COPOLYMER

摘要

PROBLEM TO BE SOLVED: To obtain an olefin-aromatic vinyl compound copolymer having excellent transparency, a proper modulus of elasticity and improved elastic recovery and shock absorption. SOLUTION: This olefin-aromatic vinyl compound copolymer satisfies|A|<=4.00 when the absolute value of an inclination A of a regression straight line in an approximate expression (I) Y=A×log10M+B...(I) (B is an intercept at Y-axis), in which a relation between an molecular weight [M (g/mol)] obtained from GPC-FTIR and an aromatic vinyl compound content [Y (mol%) is approximately expressed by a straight line by a method of least squares, is used as an inclination parameter|A|.