The effects of gamma-irradiation on compositional changes in plastic packaging films
Φόρτωση...
Ημερομηνία
Συγγραφείς
Demertzis, P. G.
Franz, R.
Welle, F.
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
Packaging Technology and Science
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
Sterilization of packaging materials for pharmaceutical or food products with ionizing ir irradiation can cause chemical and physical changes in polymer materials. The effects of gamma-irradiation on the formation of solvent extractable radiolysis products of six flexible packaging materia is for for foodstuffs and/or pharmaceutical applications were studied after treatment in a Co-60-irradiation plant. The polymer materials polyethylene, polypvoptylene, poly(ethylene terephthalate), polyamide, polystyrene and poly(vinyl chloride) were investigated after treating with an irradiation nose of 44 kGy. The compositional changes in solvent extractable radiolysis products of each packaging material were quantified. In most cases the radiolysis yl products formed could be identified using GC/MS. The polyolefine materials (PE and PP) showed an increase of low volatile compounds after irradiation due to an oxidative decomposition of the polymer and typical polymer substances like oligomers and additives. Other packaging materials such as PET, PA and PS did not significantly change their amount Of solvent extractable compounds after irradiation with 44 kGy The PVC packaging material used in this study was not resistant to irradiation treatment at all. Because of the release of HCl during irradiation a large amount of volatile substances could be extracted from PVC sheet. For consumer protection and also to meet general food packaging legislative requirements for irradiated packaging materials, it is necessary to evaluate the compositional changes in the polymers during irradiation, especially for irradiated polyolefines and PVC. Most attention should be paid to low volatile radiolysis products which are the most likely to migrate into a foodstuff or a pharmaceutical product. Copyright (C) 1999 John Wiley & Sons, Ltd.
Περιγραφή
Λέξεις-κλειδιά
plastic packaging materials, food packaging, pharmaceutical packaging, gamma-irradiation, radiolysis products, electron-beam irradiation, polyethylene film, ionizing-radiation, food, migration, volatiles, radicals
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
<Go to ISI>://000083694600005
http://onlinelibrary.wiley.com/store/10.1002/(SICI)1099-1522(199905/06)12:3<119::AID-PTS460>3.0.CO;2-G/asset/460_ftp.pdf?v=1&t=hmx476uf&s=9ca83dcb36a33fdc88244bc4c531fb1f1aca2a22
http://onlinelibrary.wiley.com/store/10.1002/(SICI)1099-1522(199905/06)12:3<119::AID-PTS460>3.0.CO;2-G/asset/460_ftp.pdf?v=1&t=hmx476uf&s=9ca83dcb36a33fdc88244bc4c531fb1f1aca2a22
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