Abstract
SUMMARY The interaction between residual vinyl chloride monomer (VCM) and polyvinyl chloride (PVC), a polymer of major use in packaging, was evaluated by using inverse gas chromatography (IGC). The polymer constituted the stationary phase and pulses of monomer were introduced into mobile phase. The specific retention volume, V° g , as well as, the thermodynamic parameters of the PVC-VCM interactionwere calculated from chromatographic data. The results showed that the polymer-monomer interaction increased as the monomer concentration and temperature decreased. Also it was found that the number of binding active sites present in the polymeric matrix, an inherent part of the polymer structure, had an effect on the polymer-monomer interaction. Those findings suggest that the migration of VCM from PVC packaging materials with very low concentrations of residual monomer should be practically nil at ambient temperature.
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