A. P. Koshcheev, P. V. Gorokhov, A. A. Perov, N. Yu. Petrenko, and S. A. Khatipov
Karpov Research Institute of Physical Chemistry, ul. Vorontsovo pole 10, Moscow, 105064 Russia
e-mail: koscheev@cc.nifhi.ac.ru
Received January 31, 2008
Abstract—The products of the pyrolysis of polytetrafluoroethylene (PTFE) in a vacuum modified under the
action of gamma irradiation in the molten state were studied mass spectrometrically at various temperatures.
Radiation modification was found to cause the appearance of an additional stage of the thermal decomposition
of PTFE at decreased temperatures compared with not irradiated PTFE. The chemical composition of the gas
components of thermal decomposition substantially changes after the irradiation of PTFE, which increases the
molecular weight of decomposition products. A comparison with the results of an additional study of the ther-
mal decomposition of tetrafluoroethylene copolymer with hexafluoropropylene is evidence of the formation of
side CF3 groups in PTFE under irradiation. Data on the composition of gaseous products of PTFE radiolysis
under gamma irradiation were obtained.
DOI: 10.1134/S0036024408100130
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