A PROCESS FOR THE PREPARATION OF VINYLAROMATIC (CO)POLYMERS GRAFTED ON AN ELASTOMER IN A CONTROLLED WAY

摘要

A process for the preparation of vinylaromatic (co)polymers grafted on an elastomer in a controlled way, comprising the dissolving of an elastomer, such as polibutadiene, in a mixture consisting of a monomer and of a solvent in the presence of a polymerization catalytic system, which comprises an initiator of free radicals and a stable initiator of free radicals. The mixture obtained in this way is heated to a temperature of about 100 °C to functionalize the rubber, then more monomer is added and the temperature is raised to start the polymerization reaction.