Theory of Gelation: Post-Gelation Behavior

TL;DR

This paper extends gelation theory to mixed systems with cyclic bonds, validating it against polyurethane data to accurately predict gel points and gel fractions.

Contribution

It introduces an extension of gelation theory to systems with different functionalities and tests its validity with experimental polyurethane data.

Findings

Theory accurately predicts gel points in polyurethane networks

Soundness of the cyclic bond assumption is confirmed

Extension applies to mixing systems with various functionalities

Abstract

Within the framework of the random distribution assumption of cyclic bonds, the preceding theory of gelation is extended to mixing systems with various functionalities. To examine the validity of the assumption, the theory is applied to experimental data in polyurethane network formation, the result showing the soundness of the theory for the prediction of gel points and gel fraction.