SHOCK VINYLAROMATIC POLYMER BY POLYMERISATION OF A VINYLAROMATIC MONOMER IN THE PRESENCE OF A STABLE FREE RADICAL AND A POLYMERISATION INITIATOR

摘要

The invention concerns a method for preparing a composition comprising a vinylaromatic polymer enclosing rubber nodules. The invention is characterised in that it includes a step for polymerising at least one vinylaromatic monomer in the presence of rubber, a polymerisation initiator and a stable free radical, said step being such that [F>SFR< x (SFR)] : [F>AMO< x (AMO)] ranges from 0.05 to 1, F>FSR< and F>AMO< representing the functionality of the stable free radical and the initiator respectively and (SFR) and (AMO) representing the molar quantities of the stable free radical and the initiator respectively. The final composition is particularly resistant to shocks and/or shiny.