Abstract
The impact of high-intensity laser radiation on a polymer in vacuum is accompanied by the release of gaseous products of degradation and, in some cases, of clusters of the partially destroyed polymer. Polytetrafluoroethylene (PTFE) exhibits an abnormal behavior in this process: being exposed to continuous CO2 laser radiation, it degrades at a high rate and its clusters have a fibrous form. Depending on the irradiation conditions, the fibrous fraction forms two types of product, “cotton wool” and “felt”. Polytetrafluoroethylene and its laser-modified “cotton wool“ product have a semicrystalline topological structure. The preliminary γ-irradiation of PTFE enhances the laser ablation process.
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Original Russian Text © Yu.A. Ol’khov, S.R. Allayarov, E.M. Tolstopyatov, P.N. Grakovich, L.A. Kalinin, Yu.A. Dobrovol’skii, D.A. Dixon, 2010, published in Khimiya Vysokikh Energii, 2010, Vol. 44, No. 1, pp. 65-76.
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Ol’khov, Y.A., Allayarov, S.R., Tolstopyatov, E.M. et al. The effect of continuous CO2 laser radiation on the thermal and molecular—Topological properties of polytetrafluoroethylene. High Energy Chem 44, 63–74 (2010). https://doi.org/10.1134/S0018143910010108
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DOI: https://doi.org/10.1134/S0018143910010108