Abstract
AbstractThe polyvinyl chloride (PVC) polymer structure was studied using inverse gas chromatography (IGC). The specific retention volume (Vg°) of a vinyl chloride monomer (VCM) probe, as well as the thermodynamic parameters of the interaction between PVC and VCM were calculated.Changes in Vg°, free energy(ΔG°s), enthalpy (ΔH°s) and entropy (ΔS°s) observed as the temperature and the amount of VCM decreased, clearly indicate that the PVC—VCM interaction was both concentration and temperature dependent. The Vg° and thermodynamic parameters also varied with changes in polymer structure. Data were interpreted in terms of the active site hypothesis. Active sites in the PVC matrix strongly bind VCM at low enough concentrations and temperatures. Inferably, migration of VCM from PVC packaging materials containing very low concentrations of residual monomer should be for all practical purposes, essentially zero, particularly at low temperatures.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
