Effect of accelerated aging on the structure and properties of monolayer and multilayer packaging films

Tarantili, PA; Kiose, V

dc.contributor.author	Tarantili, PA	en
dc.contributor.author	Kiose, V	en
dc.date.accessioned	2014-03-01T01:28:11Z
dc.date.available	2014-03-01T01:28:11Z
dc.date.issued	2008	en
dc.identifier.issn	0021-8995	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18755
dc.subject	Ageing	en
dc.subject	Films	en
dc.subject	Mechanical properties	en
dc.subject	Poly(propylene) (PP)	en
dc.subject	Polyethylene (PE)	en
dc.subject.classification	Polymer Science	en
dc.subject.other	Composite films	en
dc.subject.other	Differential scanning calorimetry	en
dc.subject.other	Ethylene	en
dc.subject.other	Laser interferometry	en
dc.subject.other	Mechanical properties	en
dc.subject.other	Metallizing	en
dc.subject.other	Multilayers	en
dc.subject.other	Plastic products	en
dc.subject.other	Polyethylene terephthalates	en
dc.subject.other	Positron emission tomography	en
dc.subject.other	Propylene	en
dc.subject.other	Pumping plants	en
dc.subject.other	Structural properties	en
dc.subject.other	Structure (composition)	en
dc.subject.other	Thermoplastics	en
dc.subject.other	Vapors	en
dc.subject.other	Water vapor	en
dc.subject.other	Accelerated aging	en
dc.subject.other	Ageing	en
dc.subject.other	Aging conditions	en
dc.subject.other	Aging cycles	en
dc.subject.other	Attenuated total reflectance spectroscopies	en
dc.subject.other	Chain scissions	en
dc.subject.other	Food packaging	en
dc.subject.other	Linking reactions	en
dc.subject.other	Mechanical responses	en
dc.subject.other	Metalized films	en
dc.subject.other	Metallic coatings	en
dc.subject.other	Multilayer packaging	en
dc.subject.other	Poly(ethylene terephthalate)	en
dc.subject.other	Poly(propylene) (PP)	en
dc.subject.other	Property changes	en
dc.subject.other	Structural characteristics	en
dc.subject.other	Structure and properties	en
dc.subject.other	Ultra violets	en
dc.subject.other	Ultraviolet stabilities	en
dc.subject.other	Water vapor transmissions	en
dc.subject.other	Multilayer films	en
dc.subject.other	aging	en
dc.subject.other	calorimetry	en
dc.subject.other	cross linking	en
dc.subject.other	degradation	en
dc.subject.other	film	en
dc.subject.other	humidity	en
dc.subject.other	mechanical property	en
dc.subject.other	packaging	en
dc.subject.other	polyethylene	en
dc.subject.other	polyethylene terephthalate	en
dc.subject.other	polypropylene	en
dc.subject.other	ultraviolet radiation	en
dc.title	Effect of accelerated aging on the structure and properties of monolayer and multilayer packaging films	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/app.28091	en
heal.identifier.secondary	http://dx.doi.org/10.1002/app.28091	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	The effect of accelerated aging on the structure and properties of single, metalized, and multilayer films used in food packaging was studied through the exposure of specimens of those films to repeated aging cycles in a weather meter under the combined action of ultraviolet, humidity, and heat. The aged specimens were tested for their mechanical properties and water vapor transmission characteristics, and the results were compared to those obtained from the original specimens. The property changes introduced into the films by aging were further explored by attenuated total reflectance spectroscopy and differential scanning calorimetry in an attempt to correlate the changes in the properties with structural characteristics. The results showed that the films made of polypropylene (PP) underwent severe chain scission upon irradiation and lost mechanical properties but still retained their impermeability to water vapor. The metallic coating could not prevent PP from degrading, as it seemed to oxidize under the aging conditions. Therefore, the metalized film showed the same mechanical response as PP, but its water impermeability dropped dramatically. Polyethylene (PE) and poly(ethylene terephthalate) (PET) films showed modest decreases in their mechanical properties, which could be attributed to crosslinking reactions taking place with PE and to the increased ultraviolet stability of PET, respectively. On the other hand, the multilayer films presented a decrease in their mechanical properties according to those of their weak component, which would be expected for a composite structure. (c) 2008 Wiley Periodicals, Inc.	en
heal.publisher	JOHN WILEY & SONS INC	en
heal.journalName	Journal of Applied Polymer Science	en
dc.identifier.doi	10.1002/app.28091	en
dc.identifier.isi	ISI:000255626700086	en
dc.identifier.volume	109	en
dc.identifier.issue	1	en
dc.identifier.spage	674	en
dc.identifier.epage	682	en