NEW CATALYTIC-SYSTEMS FOR THE FIXATION OF CARBON-DIOXIDE .2. SYNTHESIS OF HIGH-MOLECULAR-WEIGHT EPICHLOROHYDRIN CARBON-DIOXIDE COPOLYMER WITH RARE-EARTH PHOSPHONATES TRIISOBUTYL-ALUMINUM SYSTEMS

Copolymerization of carbon dioxide with epichlorohydrin to synthesize high molecular weight chlorine-containing poly(carbonate-ether) with PE(P204)3-Al[CH2CH(CH3)2]3 (with RE = La, Eu, Gd, Dy, Ho, Nd, Er, Yb, Lu, Y; P204 = (RO)2POO-, R = CH3(CH2)3CH(C2H5)CH2-) as a catalyst was carried out for the first time. The most favorable conditions for the copolymerization were: CO2 aged Y(P204)3-AI[CH2CH(CH3)2]3 as catalyst; mole ratio Al/Y = 8; reaction time 24 h; temperature 60-70-degrees-C; concentration [Y] = 3,31 . 10(-2) mol/L; 1,4-dioxane as solvent. The highest yield, intrinsic viscosity [eta] and CO2 content of the copolymer obtained reached 3 945 g per mole of rare earth element, [eta] = 1,49 dL/g and f(CO2) = 30 mol-%, respectively. Results from differential thermal analysis/thermogravimetry showed that the copolymer has high thermal stability and decomposes at 320-degrees-C.