Magnetic resonance imaging studies of diffusion in polymers

摘要

For a number of polymer/penetrant systems, for ex- ample fatty foods in direct contact with plastic wrap- ping, the migration of substances from the polymer is governed by the amount of penetrant entering the polymer. For food packaging this means that the rate of migration of substances into the food can be governed by the uptake of food into the packaging itself. To develop predictive models of migration under various conditions there is therefore a need to under- stand the mechanism of the penetration of the food into the packaging.