Theory of Gelation: Examination of the Random Distribution Assumption of Cyclic Bonds

Within the framework of the random distribution assumption of cyclic bonds, the preceding theory of gelation is extended to mixing systems with multifunctionalities. To examine the validity of the assumption, the theory is applied to experimental data in polyurethane network formation. The good agreement was found between the theory and experiments, in support of the soundness of the theory in the prediction of gel points and gel fraction.