| 摘要 |
An object of the present invention is to provide a rubber composition which can further improve abrasion resistance without deterioration in energy efficiency, and a pneumatic tire using the rubber composition. The rubber composition comprises a polymer mixture obtained by modifying a polymer composed of at least one of a conjugated diene compound and an aromatic vinyl compound with a compound having at least one of an ester group and a carboxyl group; at least one of tetraamines; and silica, the polymer mixture having a weight-average molecular weight of 1.0×10 3 to 1.0×10 5 , and the tetraamines being a compound represented by the following formula (I):
wherein each of R A , R B , R C , R D , R E , R F , R G and R H independently represents a hydrogen atom or an alkyl group, and ALK represents a tetravalent aliphatic hydrocarbon group. |
