SYNTHESIS OF CRYSTALLIZABLE COMB-LIKE OLIGOMERS BY COUPLING OF STEARYL ACRYLATE TO BUTADIENE OLIGOMERS VIA ENE REACTION AND THE INFLUENCE OF SIDE-CHAIN ORDER ON THE NETWORK FORMATION BY AUTOXIDATION

The kinetics of the ene reaction of stearyl acrylate with polybutadien e oils in the temperature range of 180 to 220-degrees-C is described. The ene reaction was found to be of pseudo 1 st order with respect to stearyl acrylate because of the excess of polybutadiene double bonds. The rate constants correlate with the reaction temperature according t o the Arrhenius law. The products show typical side-chain crystallizat ion, which has a strong influence on the viscosity and the autoxidatio n kinetics of the unsaturated polymeric backbone. Just below the cryst allization temperature of the side chains the network formation by aut oxidation is much slower than above the melting point.