A study was made of the solubility of irradiated polyethylene. The experimental data were treated according to the Saito-Inokuti theory for gel formation in polymers exposed to ionizing radiation. Among other things, this theory is based upon the molecular weight distribution of the unirradiated polymer; in the present work, the actual distributions were determined by high-temperature gel permeation chromatography and corrected for long-chain branching. Under these circumstances, good agreement between theory and experimental data was obtained, which allowed the determination of the radiation yield of main-chain scission and crosslinking.
Handlos, V. N., & Singer, K. A. J. (1976). Gel Formation in Polymers Undergoing Radiation-Induced Crosslinking and Scission. Journal of Applied Polymer Science, 20(12), 3375-3386. https://doi.org/10.1002/app.1976.070201217