Structural kinetics of the formation of hyperbranched polymers via copolycondensation in the presence of the substitution effect

Abstract

The kinetic features of the formation of hyperbranched polymers via the copolycondensation of AB2- and CB f -type polymers (A and B are functional groups; subscripts denote the number of groups B in molecules), including those in the presence of the first shell substitution effect in the primary sphere, are considered in this paper. The effects of the ratio between monomer concentrations, [CB f ]0/[AB2]0, and the functionality of the root monomer, f, on the degree of branching and the molecular-mass distribution of the reaction product are studied. It is shown that ultimate polydispersity index γ(1) is described by the equation γ(1) = K 1 + K 2 r −1 f −2, where K 1 and K 2 are empirical constants.