Mechanism of the Effect of Gamma Irradiation on the Surface Properties of Polytetrafluoroethylene
Changes in the work of adhesion γSL of polar and nonpolar liquids, as well as the dispersion and polar components of the surface energy of γS suspension-polymerized polytetrafluoroethylene (PTFE) as a function of the gamma-radiation dose are analyzed quantitatively. A physicochemical model for increasing the work of adhesion γSL of a polar liquid is proposed. The model is based on the formation of a double electrostatic layer at the phase interface due to ion-dipole interaction.
Keywordspolytetrafluoroethylene gamma irradiation dielectric increment surface energy polar groups
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