Mechanical behaviour of a poydimethylsiloxane elastomer after outdoor weathering in two different weathering locations

Eleni, PN; Krokida, MK; Charitidis, CA; Koumoulos, EP; Tsikourkitoudi, VP; Ziomas, I; Polyzois, GL

dc.contributor.author	Eleni, PN	en
dc.contributor.author	Krokida, MK	en
dc.contributor.author	Charitidis, CA	en
dc.contributor.author	Koumoulos, EP	en
dc.contributor.author	Tsikourkitoudi, VP	en
dc.contributor.author	Ziomas, I	en
dc.contributor.author	Polyzois, GL	en
dc.date.accessioned	2014-03-01T02:05:25Z
dc.date.available	2014-03-01T02:05:25Z
dc.date.issued	2011	en
dc.identifier.issn	0141-3910	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/29475
dc.subject	Compression	en
dc.subject	Nanoindentation analysis	en
dc.subject	Natural weathering	en
dc.subject	Polydimethylsiloxane	en
dc.subject	Tensile testing	en
dc.subject.classification	Polymer Science	en
dc.subject.other	MAXILLOFACIAL ELASTOMERS	en
dc.subject.other	PHYSICAL-PROPERTIES	en
dc.subject.other	ELASTIC-MODULUS	en
dc.subject.other	CROSS-LINKING	en
dc.subject.other	NANOINDENTATION	en
dc.subject.other	DEGRADATION	en
dc.subject.other	POLYMERS	en
dc.subject.other	SILICONE	en
dc.subject.other	POLYETHYLENE	en
dc.subject.other	INDENTATION	en
dc.title	Mechanical behaviour of a poydimethylsiloxane elastomer after outdoor weathering in two different weathering locations	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	The degradation of maxillofacial prosthetic elastomers that occur during physical weathering is usually responsible for the replacement of the prosthesis. In this study the mechanical behaviour of a polydimethylsiloxane (PDMS) elastomer was investigated, after 1 year outdoor weathering in two different weathering locations in Greece (Thessaloniki, Athens). The hypothesis investigated was that irradiation time did not affect the measured properties. Specimens (Elastomer 42) were prepared according to manufacturer's instructions and exposed to solar radiation for 1 year. Compression, tensile and nanoindentation tests were performed before and after the exposure. Compression and tensile data were also subjected to analysis of variance (ANOVA) and Tukey Post hoc tests at a level of x = .05. These properties were selected due to their clinical significance for fabrication and maintenance of a facial prosthesis. According to statistical analysis all the measured properties changed significantly after outdoor weathering. More specifically, most of the properties presented significant changes after six months of weathering. The observed changes also depended on the weathering locations. The hypothesis investigated was rejected. Material A became harder and the observed differences in the mechanical behaviour resulted from photo-degradation and hydrolysis that might occur due to weathering. The study also provides new information about maxillofacial prosthetics serviceability obtained from nanoindentation tests. (C) 2011 Elsevier Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	POLYMER DEGRADATION AND STABILITY	en
dc.identifier.isi	ISI:000288877300009	en
dc.identifier.volume	96	en
dc.identifier.issue	4	en
dc.identifier.spage	470	en
dc.identifier.epage	476	en