Rubber composition including a functionalized thermoplastic polymer

A reinforced rubber composition based on at least:

• a diene elastomer,
• a non-reinforcing filler comprising from 3 to 30 phr of a thermoplastic polymer,
• a reinforcing filler comprising a reinforcing inorganic filler,
• a coupling agent providing the bond between the diene elastomer and the reinforcing inorganic filler,
• wherein the thermoplastic polymer has a number-average molar mass, Mn, between 500 g/mol and 20 000 g/mol, and bears, at at least one chain end, a specific functional group selected from the group consisting of Si(OR1)nR2(3-n), Si(OH)R12 or (SiR12—O)p—H, where:
• R1, which are identical or different, each represent a monovalent hydrocarbon-based group selected from alkyls, which are linear or branched, cycloalkyls or aryls, having from 1 to 18 carbon atoms,
• R2, which are identical or different, each represent a hydrogen or a monovalent hydrocarbon-based group selected from alkyls, which are linear or branched, cycloalkyls or aryls, having from 1 to 18 carbon atoms, the hydrocarbon-based group optionally bearing at least one functional group selected from a primary, secondary or tertiary amine, an imine and an epoxy,
• n represents an integer ranging from 1 to 3,
• p represents an integer ranging from 2 to 30.