TERNARY ELASTOMERIC COPOLYMER COMPRISING DIENE AND METHOD FOR PREPARING SAME

摘要

The present invention relates to a ternary elastomeric copolymer having a long chain branch obtained in the presence of a group IV transition metal catalyst and capable of achieving both excellent processability and excellent elasticity (flexibility) and a method for preparing the same. The ternary elastomeric copolymer is a copolymer of ethylene an alpha olefin having 3 to 20 carbon atoms and a diene i) having a weight average molecular weight of 100 000 to 500 000 measured by GPC; and ii) capable of having a positive value on the LCB index which is the ratio of a first harmonic of the storage modulus of elasticity measured by a rubber process analyzer at 125°C using the Large Angles of Oscillation and high Strains (LAOS) method with respect to a fifth harmonic of the storage modulus of elasticity.