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

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

dc.contributor.author	Eleni, PN	en
dc.contributor.author	Krokida, MK	en
dc.contributor.author	Polyzois, GL	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.date.accessioned	2014-03-01T01:36:05Z
dc.date.available	2014-03-01T01:36:05Z
dc.date.issued	2011	en
dc.identifier.issn	01413910	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/21271
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.other	Before and after	en
dc.subject.other	Compression	en
dc.subject.other	Facial prosthesis	en
dc.subject.other	Irradiation time	en
dc.subject.other	Measured properties	en
dc.subject.other	Mechanical behaviour	en
dc.subject.other	Nanoindentation analysis	en
dc.subject.other	Nanoindentation tests	en
dc.subject.other	Natural weathering	en
dc.subject.other	Outdoor weathering	en
dc.subject.other	Physical weathering	en
dc.subject.other	Polydimethylsiloxane PDMS	en
dc.subject.other	Statistical analysis	en
dc.subject.other	Thessaloniki	en
dc.subject.other	Tukey post hoc test	en
dc.subject.other	Behavioral research	en
dc.subject.other	Data compression	en
dc.subject.other	Elastomers	en
dc.subject.other	Materials testing apparatus	en
dc.subject.other	Mechanical engineering	en
dc.subject.other	Nanoindentation	en
dc.subject.other	Plastics	en
dc.subject.other	Prosthetics	en
dc.subject.other	Regression analysis	en
dc.subject.other	Silicones	en
dc.subject.other	Soil mechanics	en
dc.subject.other	Sun	en
dc.subject.other	Tensile strength	en
dc.subject.other	Tensile testing	en
dc.subject.other	Weathering	en
dc.subject.other	Analysis of variance (ANOVA)	en
dc.title	Mechanical behaviour of a poydimethylsiloxane elastomer after outdoor weathering in two different weathering locations	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.polymdegradstab.2011.01.017	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.polymdegradstab.2011.01.017	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 α = .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. © 2011 Elsevier Ltd. All rights reserved.	en
heal.journalName	Polymer Degradation and Stability	en
dc.identifier.doi	10.1016/j.polymdegradstab.2011.01.017	en
dc.identifier.volume	96	en
dc.identifier.issue	4	en
dc.identifier.spage	470	en
dc.identifier.epage	476	en