Abstract
A series of copolymers in the composition range 5–70 mol-% propylene were prepared under kinetically controlled conditions. The copolymerization was carried out at constant monomer feed composition in a homogeneous reaction medium, using the soluble catalyst system vanadium oxytrichloride/ethylaluminium sesquichloride. From the kinetic data the distribution functions of the ethylene sequence lengths were calculated. These values were then correlated with the distribution of the fragment chain lengths obtained from the thermal degradation with subsequent reaction gas chromatography of the copolymers. Good agreement between the kinetic and the pyrolysis values of the ethylene sequence length distribution is observed in samples with up to 50 mol-% propylene.
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