Rubber composition including conjugated diene polymer and olefin polymer and tire using same

A rubber composition comprising a matrix of a nonpolar conjugated diene polymer in which domains formed of an olefin polymer are dispersed, the matrix and the domain having an interface therebetween in which a chemical bond exists after vulcanization, the domain having a dynamic compressive complex elastic modulus (Ec*) of 10 MPa or less, wherein the dynamic compressive complex elastic modulus (Ec*) is obtained by the steps of:

• fixing a sample to a sample fixing base specialized for an atomic force microscope (AFM);
• measuring a shape image in an AC mode with the AFM and a cantilever (material:
• Si, spring constant:
• 48 N/m, radius of curvature at the tip:
• 150 nm) at room temperature (23° C.) and simultaneously measuring a force curve of a portion observed as the domain in a contact mode (at room temperature (23° C.), with a moving speed of the cantilever of 2 μm/s and a maximum indentation load of 2 μN);
• and analyzing a force-volume curve obtained from the force curve based on the theory of Hertz included in the software attached to the AFM device.