A mixture of functionalized polymers to a tire

A mixture consisting of polymers (a) 60 to 96% by weight of a first elastomeric polymer, (b) 4 to 35% by weight of a second polymer and optionally (c) 0 to 13% by weight of one or more extender oils; wherein the first elastomeric polymer is obtainable by (I) anionic polymerization of at least one conjugated diene monomer and optionally one or more monomers α-olefin in the presence of a polymerization initiator in an organic solvent, and optionally (II) modifying the ends polymer chain obtained in (I) by addition and reaction of at least one compound represented by any of formula (1) to (3) or formula (11) to (15), as defined below; wherein the second polymer is obtainable by (i) anionic polymerization in the presence of a polymerization initiator in an organic solvent (i-1) at least one conjugated diene monomer or (i-2) at least one conjugated diene monomer and one or α-olefinic more monomers or (i-3) at least one or more monomers α-olefin and (ii) modifying the ends of polymer chain obtained in (i) by addition and reaction of at least one compound represented by any of formula (1), formula (3) or formula (11) to (15), as defined in claim 1, provided that, in the corresponding formula, x, x1, r4, t1 and v are selected each of 1 and 2; wherein the first elastomeric polymer (a) having a number average molecular weight (Mn) of 400,000 to 2,000,000 g / mol, and a weight average molecular weight (Mw) of 500,000 to 3,000,000 g / mol; wherein the second polymer (b) has a number average molecular weight (Mn) of 500 to 80,000 g / mol and a weight average molecular weight (Mw) of 500 to 100,000 g / mol, and wherein the amounts of components (a) , (b) and (c) they are based on the total weight of the polymer blend; (R *** O) x (R **) and Si-SiR ** AS-3 formula (1), ...