PROCESS FOR THE SYNTHESIS OF FUNCTIONALIZED POLY(1,3-ALKADIENES) AND USE THEREOF IN THE PREPARATION OF HIGH IMPACT VINYL AROMATIC POLYMERS

摘要

Process for the preparation of vinyl aromatic (co) polymers grafted on an elastomer in a controlled manner, comprising: dissolving an elastomer functionalized with bromoalkanes and nitroxy radicals, soluble in non-polar solvents, in a liquid phase consisting of a mixture of vinyl aromatic monomer (s) /polymerization solvent; feeding at least one radical initiator to the mixture, containing the functionalized elastomer in solution, and polymerizing the mixture thus obtained at a temperature higher than or equal to 1200C; recovering the vinyl aromatic (co) polymer obtained after devolatization; and recycling the solvent /monomer (s) mixture, coming from the devolatization, to step (a).