Modification chimique de polyalcadiènes par les composés du type CX 3POZ 2—II : Modification des polybutadiènes-1,2 par le dichlorure de trichlorométhyl-phosphonyle catalysée par le dichlorure de tris(triphénylphosphine)ruthénium II

Abstract

The catalytic influence of dichlorotris (triphenylphosphine) ruthenium II, Cl 2Ru (PPh 3) 3 (I), on chemical modification of 1,2-polybutadienes ( M n < 10,000 ) by trichloromethylphosphonyl dichloride, CCl 3POCl 2 (II) has been studied. The catalytic activity of (I) has been compared with those of redox systems, CuCl 2/Et 3NHCl, FeCl 3/Et 3NHCl/benzoïn. In addition to good solubility in the usual solvents, the polymers modified with (I) contain a higher percentage of DTMP and side reactions, including HCl elimination, are fewer. The influences of various parameters on the yield of the reaction catalysed by (I) have been examined. (Reaction temperature, nature and quantity of solvent, reagent and catalyst concentrations, reaction time, surrounding atmosphere.)