Influence of a Monomeric Plasticizer on the Water-Sorption Behavior of Food-Grade Plastics Packaging Materials
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Ημερομηνία
Συγγραφείς
Τίτλος Εφημερίδας
Περιοδικό ISSN
Τίτλος τόμου
Εκδότης
Wiley-Blackwell
Περίληψη
Τύπος
Είδος δημοσίευσης σε συνέδριο
Είδος περιοδικού
peer reviewed
Είδος εκπαιδευτικού υλικού
Όνομα συνεδρίου
Όνομα περιοδικού
Polymer International
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
The interaction of water with poly(vinylchloride) and poly(vinylidene chloride-vinylchloride) (p(VdC-VC)) plasticized with different amounts of a monomeric plasticizer (dioctylphthalate) has been studied using inverse gas chromatography. The present work was focused on the effect of temperature and plasticizer content on the water sorption behaviour of these plastics packaging materials. Values for thermodynamic parameters such as Gibb's free energy (DELTAG(s)), enthalpy (DELTAH(s)), entropy (DELTAS(s)) and activity coefficient (gamma) corresponding to sorption of water by the polymers have been calculated using chromatographic retention data. It was found that the sorption of water vapours increases with increasing the amount of plasticizer and decreases with increasing temperature. The Van Deemter equation was found to be applicable to these systems and was used to determine diffusion coefficients and activation energies for diffusion. Diffusion coefficient values increase with increasing amounts of plasticizer and they also increase with increasing temperature; this latter increase is accompanied by a decrease in the activation energy for diffusion. Present results were also compared to our own previous data, using a polymeric plasticizer.
Περιγραφή
Λέξεις-κλειδιά
inverse gas chromatography, sorption, diffusion, water, polymer, plasticizer, diffusion
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
<Go to ISI>://A1993LF61700002
http://onlinelibrary.wiley.com/store/10.1002/pi.4990320203/asset/4990320203_ftp.pdf?v=1&t=hmx47mco&s=a8781e00e627453f395147b86e5147ce625c099e
http://onlinelibrary.wiley.com/store/10.1002/pi.4990320203/asset/4990320203_ftp.pdf?v=1&t=hmx47mco&s=a8781e00e627453f395147b86e5147ce625c099e
Γλώσσα
en
Εκδίδον τμήμα/τομέας
Όνομα επιβλέποντος
Εξεταστική επιτροπή
Γενική Περιγραφή / Σχόλια
Ίδρυμα και Σχολή/Τμήμα του υποβάλλοντος
Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας