The effect of accelerated ageing on performance properties of addition type silicone biomaterials

Stathi, K; Tarantili, PA; Polyzois, G

dc.contributor.author	Stathi, K	en
dc.contributor.author	Tarantili, PA	en
dc.contributor.author	Polyzois, G	en
dc.date.accessioned	2014-03-01T01:34:44Z
dc.date.available	2014-03-01T01:34:44Z
dc.date.issued	2010	en
dc.identifier.issn	0957-4530	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20830
dc.subject	Chemical Structure	en
dc.subject	Free Volume	en
dc.subject	Group Presentation	en
dc.subject	Silica	en
dc.subject	Tensile Properties	en
dc.subject	Tensile Strength	en
dc.subject	Thermal Decomposition	en
dc.subject	Uv Irradiation	en
dc.subject	Uv Light	en
dc.subject	Uv Radiation	en
dc.subject.classification	Engineering, Biomedical	en
dc.subject.classification	Materials Science, Biomaterials	en
dc.subject.other	Absorbances	en
dc.subject.other	Accelerated ageing	en
dc.subject.other	Accelerated ageing conditions	en
dc.subject.other	Chain fragments	en
dc.subject.other	Chain scission	en
dc.subject.other	Chemical structure	en
dc.subject.other	Dry pigments	en
dc.subject.other	Elastomeric materials	en
dc.subject.other	Experimental parameters	en
dc.subject.other	Functional liquid	en
dc.subject.other	Hydrophobic character	en
dc.subject.other	matrix	en
dc.subject.other	Nanofiller	en
dc.subject.other	Performance properties	en
dc.subject.other	Post-curing	en
dc.subject.other	Reinforcing effects	en
dc.subject.other	Silica filler	en
dc.subject.other	Silicone elastomers	en
dc.subject.other	Spectroscopic data	en
dc.subject.other	Storage moduli	en
dc.subject.other	Thermal decompositions	en
dc.subject.other	UV irradiation	en
dc.subject.other	UV light absorber	en
dc.subject.other	UV radiation	en
dc.subject.other	UV-protection	en
dc.subject.other	Biological materials	en
dc.subject.other	Elastic moduli	en
dc.subject.other	Elastomers	en
dc.subject.other	Photodegradation	en
dc.subject.other	Pyrolysis	en
dc.subject.other	Rubber	en
dc.subject.other	Silica	en
dc.subject.other	Silicones	en
dc.subject.other	Tensile strength	en
dc.subject.other	Ultraviolet radiation	en
dc.subject.other	Paint	en
dc.subject.other	biomaterial	en
dc.subject.other	coloring agent	en
dc.subject.other	elastomer	en
dc.subject.other	filler	en
dc.subject.other	nanofiller	en
dc.subject.other	pigment	en
dc.subject.other	silane derivative	en
dc.subject.other	silicon dioxide	en
dc.subject.other	silicone	en
dc.subject.other	unclassified drug	en
dc.subject.other	vinyl derivative	en
dc.subject.other	absorption	en
dc.subject.other	article	en
dc.subject.other	chemical structure	en
dc.subject.other	colorimetry	en
dc.subject.other	decomposition	en
dc.subject.other	degradation	en
dc.subject.other	glass transition temperature	en
dc.subject.other	hydrophobicity	en
dc.subject.other	hypothesis	en
dc.subject.other	infrared radiation	en
dc.subject.other	infrared spectroscopy	en
dc.subject.other	molecular stability	en
dc.subject.other	priority journal	en
dc.subject.other	sensitivity analysis	en
dc.subject.other	storage	en
dc.subject.other	tensile strength	en
dc.subject.other	thermal exposure	en
dc.subject.other	thermogravimetry	en
dc.subject.other	ultraviolet irradiation	en
dc.subject.other	ultraviolet radiation	en
dc.subject.other	Biocompatible Materials	en
dc.subject.other	Coloring Agents	en
dc.subject.other	Elasticity	en
dc.subject.other	Silicone Elastomers	en
dc.subject.other	Silicones	en
dc.subject.other	Tensile Strength	en
dc.subject.other	Ultraviolet Rays	en
dc.title	The effect of accelerated ageing on performance properties of addition type silicone biomaterials	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/s10856-010-3991-y	en
heal.identifier.secondary	http://dx.doi.org/10.1007/s10856-010-3991-y	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	The UV-protection provided to addition type silicone elastomers by various colorants, such as conventional dry earth pigments, as well as the so called ""functional or reactive"" pigments, was investigated. Moreover, the effect of a UV light absorber and a silica filler was also explored. Under the experimental parameters of this work, the exposure of silicone to UV radiation resulted in some changes of the IR absorbance, thermal decomposition after 400°C, Tg and tensile properties, whereas the storage modulus of samples was not affected. The obtained spectroscopic data, as well as the results of TGA and storage modulus, were interpreted by assuming that chain scission takes place during aging, whereas the improvement of tensile strength allows the hypothesis of a post-curing process, initiated by UV radiation. Therefore, the increase of Tg could partly be due to the above reason and, furthermore, to the contribution of a rearrangement of chain fragments within the free volume of the elastomeric material. Regarding the evaluation of various coloring agents used in this work, the obtained results show that dry pigments are more sensitive to accelerated ageing conditions in comparison with functional liquid pigments. Moreover, the hydrophobic character of silicone matrix is enhanced, with the addition of this type pigments because of the vinyl functional silanes groups present in their chemical structure. Finally, it should be noted that the incorporation of silica nanofiller did not seem to prevent the silicone elastomer from degradation upon UV irradiation, but showed a significant reinforcing effect. © Springer Science+Business Media, LLC 2010.	en
heal.publisher	SPRINGER	en
heal.journalName	Journal of Materials Science: Materials in Medicine	en
dc.identifier.doi	10.1007/s10856-010-3991-y	en
dc.identifier.isi	ISI:000277603000001	en
dc.identifier.volume	21	en
dc.identifier.issue	5	en
dc.identifier.spage	1403	en
dc.identifier.epage	1411	en