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 triamines; and silica, the polymer mixture having a weight-average molecular weight of 1.0.times.10.sup.3 to 1.0.times.10.sup.5, and the triamines being a compound represented by the following formula (I): ##STR00001## wherein each of R.sup.A, R.sup.B, R.sup.C, R.sup.D and R.sup.E independently represents a hydrogen atom or an alkyl group, and each of ALK.sup.1 and ALK.sup.2 independently represents an alkylene group.

triamine/atrofia

Rubber composition and pneumatic tire

Täydellisin lääketieteellinen tietokanta tieteen tukemana