The polymerization with positional isomerism has been theoretically studied by means ofthe nonsteady-state kinetic method. The distribution function of head-to-tail sequence, theexpressions of the concentrations of head-to-head and tail-to- tail enchainments, and variousdyad and triad fractions have been rigorously derived on the basis of the reaction scheme.Finally, the relationships between the microstructural parameters of the resultant polymerand the polymerization conditions have been established, so that the microstructure of thepolymer with positional isomerism can be predicted from the polymerization conditions. In thecase of the reaction time being long enough, the expressions of dyad and triad fractionsgiven in this paper are simplified into those derived from the probability method.
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