Cinétique de télomérisation, 3. Détermination des constantes de tranfert en catalyse rédox

Three methods were used for the determination of transfer constants to the metallic complex in the telomerization reaction with redox catalysis. The first one consists in the determination of DP _n as a function of the mole ratio of telogen to monomer at the beginning of the reaction. The second one is based on the variation of the conversion degree of telogen to monomer. The last one requires the knowledge of the cumulated DP _n and the conversion degree of monomer samples during the reaction. The proposed laws were checked following the methyl acrylate telomerisation with CCl₄ as a telogen and CuCl₂ as a catalyst at 120°C. The transfer constant to CuCl₂ was found to be about 600 according to the three methods.