Molecular Weight Distribution Modeling in Step Growth Polymerization of Oligomers

An approach to modeling the oligomer composition distribution function in the irreversible step growth homopolymerization process based on a mixture of oligomers of arbitrary composition is developed. The approach is based on consideration of probabilities of processes in the system, proceeding on the principle of P. Flory and obtaining on this basis an infinite system of differential equations linking mole fractions of each oligomer of a finite mixture with the degree of transformation.