PARTITION OF VCM IN PLASTICIZED PVC/FOOD SIMULANT SYSTEMS

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Abstract
Partition of Vinyl Chloride Monomer (VCM) between plasticized PVC films and corn oil and between PVC films and water was studied. A specific procedure with predetermined calibration curves has to be followed in order to obtain reliable and reproductive results. At very low VCM levels, the partition coefficient increased with decrease in monomer concentration indicating a preference of the monomer towards the polymer. In plasticized PVC films, the level of plasticization may affect the residual VCM in the film, the rate and extent of monomer migration from the polymeric matrix, as well as the equilibrium monomer distribution between the PVC and the contracting phase.