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Surface Modification of Poly(tetrafluoroethylene) by Synchrotron Radiation Exposure under Several Kinds of Gas Atmosphere

The surface modification of poly(tetrafluoroethylene) (PTFE) sheet was carried out by exposing the sheet to synchrotron radiation (SR) ranging 50–1000 eV under O2, H2O and CH3OH gas atmospheres. The wettability of the PTFE surface was found to increase with SR dose under each gas atmosphere. The rate of increase in the wettability of the PTFE surface exposed to SR under the O2 gas atmosphere was higher than those of the PTFE surfaces exposed to SR under the other gas atmospheres. The decrease in the amount of –CF2 component and the presence of –C=O and –OH components were observed on a hydrophilic PTFE surface.