Studies on the γ‐irradiation of natural rubber latex. The effects of organic halogen compounds on crosslinking by γ‐irradiation

摘要: As the accelerating effect of water in crosslinking reaction rubber natural latex by gamma irradiation was assumed to stem from decomposition into radicals irradiation, more effective reagents were sought among organic halides which have greater G values for radical formation and, simultaneously, an affinity than that water. l,2-Dichloroethane, chloroform, carbon tetrachloride, and benzene (for comparison) tested, these compounds, except benzene, found accelerate proportion their formation. Benzene no effect, concentrations between 1 5 phr. The optimum dosage decreased 2.1 x l0/ sup 6/, l.0 l0/sup 7.6 5/ r addition 1, 3, phr respectively, l.l7 10/sup 7/, 9.0 6/ with l,2- dichloroethane, 8.6 6.2 5.2 spectively. physical properties films obtained at dosagesmore » under condiitions equal those irradiated up ihe halide. No side reactions occurred during halide-accelerated sufficiently extensive influenee infrared spectra. (auth)« less