DIENE ELASTOMER WITH A REDUCED PI HAVING A SILANOL FUNCTION AT THE CHAIN END AND COMPOSITION CONTAINING SAME

摘要

The invention concerns a modified diene elastomer comprising: a) at least 70% by weight, relative to the total weight of the modified diene elastomer, of a diene elastomer functionalised at one chain end with a silanol function or a polysiloxane block having a silanol end and having a polymolecularity index before functionalisation less than or equal to 1.6, b) more than 0 and up to 30% by weight, relative to the total weight of the modified diene elastomer, of a star-branched diene elastomer having a polymolecularity index before star-branching less than or equal to 1.6, the Mooney viscosity of said modified diene elastomer varying from 30 to 80.