STUDY OF DIFFUSION AND TRAPPING OF A FLUORINATED HYDROCARBON IN ION-BEAM IRRADIATED POLY(STYRENE) BY NUCLEAR-RESONANCE REACTION ANALYSIS

The swelling of a poly(styrene) (PS) glass by sorption of a fluorinate d hydrocarbon, 3,5-bis (trifluoromethyl) aniline (TFMA) is considered in a regime characterized by so called case II diffusion. Attention is focused on diffusion and trapping of vapor into ion beam irradiated g lassy PS by using nuclear resonance reaction analysis. The diffusion c oefficient for the TFMA is dramatically decreased on irradiation with a 30 keV H+ with 5 X 10(13) - 1 X 10(14) atoms/cm2 at 22.5-degrees-C. These ion beam irradiation effects are similar to temperature effects on diffusion. As an application of the observed effect, trapping the T FMA was carried out between two different ion beam irradiation regions into PS at room temperature. This feature may allow development of ne w kinds of devices for applications.