Abstract
General unequal reactivity in reversible step-growth polymerization has been modelled by assuming that monomer reacts at different rates. The generation relation for the moment-generating function G has been derived for polymerization in homogeneous continuous-flow stirred tank reactors. It is a non-linear ordinary differential equation and has been solved analytically using the Frobenius method. Analytical solution of the molecular-weight distribution of the polymer is obtained from this in a natural way and is shown to be valid even when there is flashing of condensation product. Subsequently, the molecular-weight distribution at equilibrium has been derived.
Published Version
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