| abstract |
The invention relates to a modified diene elastomer comprising: a) at least 70% by weight, relative to the total weight of the modified diene elastomer, of a linear diene elastomer functionalised predominantly in the middle of the chain with an alkoxysilane group, optionally partially or completely hydrolysed to silanol, the alkoxysilane group optionally bearing another function capable of interacting with a reinforcing filler, the alkoxysilane group being bonded to the two branches of the diene elastomer by means of the silicon atom, said functionalised diene elastomer having a polydispersity 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 polydispersity index before star-branching less than or equal to 1.6, the Mooney viscosity of said modified diene elastomer varying from 30 to 80. |