Radiolysis of cyclohexane in a xenon matrix at 77 °K

Abstract

Low concentrations (less than 7 mole %) of cyclohexane and cyclohexane-dl have been irradiated in xenon matrices at 77 OK. The products are qualitatively the same as those obtained by the radiolysis of the pure hydrocarbon but the yields differ. In particular G(Hz) = 6.7 for 6.2 mole % cyclohexane is much higher than that for solid cyclohexane at the same temperature (4.65). (All G values are calculated on energy absorbed in the whole sample.) The G values for products are reduced to limiting values, which are -50-75 % of the initial ones, by low concentrations of SF,. Carbon tetrachloride reduces the yields to a greater extent than does SF,. Both ionic and nonionic product formation probably occur. Ion chamber dosimetry has been used to determine the energy absorption by xenon which is anomalous due to the presence of low energy, scattered gammas in the cobalt-60 source.

Effect of Gamma Irradiation on Fully Aliphatic Poly(Propylene/Neopentyl Cyclohexanedicarboxylate) Random Copolymers

“…It is well known that polymers containing aliphatic structure are sensible to radiations [14,15] but there are no systematic studies on the radiation induced effects in aliphatic polyesters containing cyclohexylene rings. The ionizing radiation effects on cyclic compounds lead to carbon-hydrogen bond breakage and, in the case of cyclohexane, the resulting molecular radicals disproportionate and the H atom mainly combines or undergoes H abstraction [16,17].…”