CASE-II DIFFUSION IN THE PVC AND ACETONE SYSTEM

This paper describes how nuclear magnetic resonance (NMR) has been use d to study case II diffusion of acetone into PVC. NMR is supported by ion Beam Nuclear Reaction Analysis and Gravimetric Analysis. A series of experiments with different PVC exposure times to acetone vapour hav e shown the observable physical characteristics of ease II diffusion. Experiments in the temperature range 20-50 degrees C have yielded the temperature dependence of the front velocity and the T-2 values of the acetone and PVC components.