The effects of gamma-irradiation on compositional changes in plastic packaging films

Το τεκμήριο παρέχεται από τον φορέα :

Αποθετήριο :
Ιδρυματικό Αποθετήριο Ολυμπιάς
δείτε την πρωτότυπη σελίδα τεκμηρίου
στον ιστότοπο του αποθετηρίου του φορέα για περισσότερες πληροφορίες και για να δείτε όλα τα ψηφιακά αρχεία του τεκμηρίου*
κοινοποιήστε το τεκμήριο

The effects of gamma-irradiation on compositional changes in plastic packaging films (EN)

Demertzis, P. G. (EN)

Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας (EL)
Demertzis, P. G. (EN)

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. (EN)

plastic packaging materials (EN)

Packaging Technology and Science (EN)

Αγγλική γλώσσα


Wiley-Blackwell (EN)

*Η εύρυθμη και αδιάλειπτη λειτουργία των διαδικτυακών διευθύνσεων των συλλογών (ψηφιακό αρχείο, καρτέλα τεκμηρίου στο αποθετήριο) είναι αποκλειστική ευθύνη των αντίστοιχων Φορέων περιεχομένου.