| 摘要 |
<p>Provided are: a rubber composition that improves fuel economy, wet grip performance, and dry grip performance together while maintaining the balance between them; and a pneumatic tire whose component (particularly tread) includes the rubber composition. The invention relates to a rubber composition containing: a rubber component containing a copolymer; and a silica, wherein the copolymer is obtained by copolymerization of 1,3-butadiene, styrene, and a compound of formula (I) below, has an amino group at a first chain end and a functional group containing at least one atom selected from the group consisting of nitrogen, oxygen, and silicon at a second chain end, and has a Mw of 1.0×10 5 -2.5×10 6 , and the silica has an average length W 1 between branched particles Z-Z inclusive of the branched particles Zs of 30-400 nm, wherein the branched particles Zs are each adjacent to at least three particles;
wherein R 1 represents a C1-C10 hydrocarbon group.</p> |
