Abstract
Modification of the photoelectron and C KVV spectra during the long-term surface degradation of partially crystalline PVDF under simultaneous soft X-ray and electron irradiation are reported. Deep radiative carbonization brings about the formation of carbynoid structures (chain-like carbon) in the surface; as a result the shape of the electron emission spectra of carbon in the carbonized sample essentially differs from that of graphite and PVDF. Analysis of carbon core-level electron spectra via decomposition onto spectral components shows presence of partially (CH, CF) and fully (=C=, -C≡) carbonized units of polymeric chain thus pointing on two-step mechanism of polyme ric chain transformation from the initial to a carbynoid. Results of the mathematical modeling of the first step of the chain transformation show it to be a second order process.
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Original Russian Text© A.M. Kuvshinov, S.S. Chebotaryov, L.A. Pesin, I.V. Gribov, N.A. Moskvina, V.L. Kuznetsov, S.E. Evsyukov, T.S. Sapozhnikova, A.A. Mirzoev, 2010, published in Poverkhnost’. Rentgenovskie, Sinkhrotronnye i Neitronnye Issledovaniya, No. 2, pp. 45–51.
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Kuvshinov, A.M., Chebotaryov, S.S., Pesin, L.A. et al. Kinetic of poly(vinylidene fluoride) defluorination under X-ray irradiation. J. Surf. Investig. 4, 122–127 (2010). https://doi.org/10.1134/S1027451010010180
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DOI: https://doi.org/10.1134/S1027451010010180