| abstract |
After the vinyl aromatic monomer, the conjugated diene monomer, or both are polymerized in the presence of an anionic polymerization initiator, an alkoxy aluminum compound is added thereto to stop the polymerization reaction, thereby producing End modified polymer. Alternatively, an aluminum alkoxide compound may be added to replace the alkoxy aluminum compound, and after the polymerization reaction is stopped, the terminal modified polymer may be produced by reacting with a lower alcohol having 1 to 4 carbon atoms. The obtained terminal modified polymer can improve the dispersibility of cerium oxide using a blending agent or the like as a rubber composition for an automobile pneumatic tire. |