ORGANIC SYSTEM FOR THE RING-OPENING POLYMERIZATION OF CYCLIC CARBONATES IN ORDER TO OBTAIN (BIO)-POLYCARBONATES

摘要

The invention relates to a novel organocatalytic system having a sulphonic acid as catalyst and intended for the polymerization of carbonates, and a polymerization method using said system, which can be used to obtain bio-polycarbonates free of ether units intercalated by decarboxylation. The catalyst system for the ring-opening polymerization reaction of cyclic carbonates is formed from by initiator and, as catalyst, a sulphonic acid having formula R'-SO3H, wherein R' denotes either (i) a linear alkyl group containing from 1 to 20 carbon atoms or a branched or cyclic alkyl group containing from 3 to 20 carbon atoms, or (ii) an aryl group optionally substituted with at least: a linear alkyl substituent containing from 2 to 20 carbon atoms or a branched or cyclic alkyl group containing from 3 to 20 carbon atoms; a halogen group chosen from fluorine, chlorine, bromine or iodine; a nitro group; or a CR1R2R3 group, wherein R1 denotes a halogen atom and R2 and R3 independently denote a hydrogen atom or a halogen atom.