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

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The effect of accelerated ageing on performance properties of addition type silicone biomaterials (EN)
Stathi, K (EN)
Polyzois, G (EN)
Tarantili, PA (EN)
journalArticle (EN)
2014-03-01T01:34:44Z
2010 (EN)
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)
Engineering, Biomedical (EN)
Materials Science, Biomaterials (EN)
tensile strength (EN)
biomaterial (EN)
sensitivity analysis (EN)
Elasticity (EN)
Uv Light (EN)
elastomer (EN)
degradation (EN)
Tensile Properties (EN)
Silica (EN)
Absorbances (EN)
Hydrophobic character (EN)
Silicone elastomers (EN)
Ultraviolet Rays (EN)
silicon dioxide (EN)
Accelerated ageing (EN)
UV light absorber (EN)
Silicones (EN)
Tensile Strength (EN)
Elastic moduli (EN)
Pyrolysis (EN)
silicone (EN)
Free Volume (EN)
absorption (EN)
silane derivative (EN)
Elastomeric materials (EN)
Nanofiller (EN)
Chain scission (EN)
pigment (EN)
UV irradiation (EN)
Paint (EN)
Tensile strength (EN)
article (EN)
Silicone Elastomers (EN)
Biological materials (EN)
UV radiation (EN)
Chemical Structure (EN)
Ultraviolet radiation (EN)
vinyl derivative (EN)
Experimental parameters (EN)
Thermal decompositions (EN)
molecular stability (EN)
Uv Radiation (EN)
Biocompatible Materials (EN)
Group Presentation (EN)
Storage moduli (EN)
nanofiller (EN)
coloring agent (EN)
unclassified drug (EN)
Functional liquid (EN)
Coloring Agents (EN)
thermogravimetry (EN)
ultraviolet irradiation (EN)
Reinforcing effects (EN)
decomposition (EN)
storage (EN)
Dry pigments (EN)
matrix (EN)
colorimetry (EN)
Chain fragments (EN)
Silica filler (EN)
priority journal (EN)
Rubber (EN)
infrared spectroscopy (EN)
Photodegradation (EN)
Thermal Decomposition (EN)
Uv Irradiation (EN)
Chemical structure (EN)
Elastomers (EN)
Post-curing (EN)
Spectroscopic data (EN)
Performance properties (EN)
glass transition temperature (EN)
thermal exposure (EN)
UV-protection (EN)
ultraviolet radiation (EN)
hydrophobicity (EN)
filler (EN)
chemical structure (EN)
infrared radiation (EN)
Accelerated ageing conditions (EN)
hypothesis (EN)
Journal of Materials Science: Materials in Medicine (EN)
Αγγλική γλώσσα
SPRINGER (EN)
Εθνικό Μετσόβιο Πολυτεχνείο
Ψηφιακό Αποθετήριο της Κεντρικής Βιβλιοθήκης του ΕΜΠ | Dspace@NTUA
Κεντρική Βιβλιοθήκη Ε.Μ.Π.
Ιδρυματικό Αποθετήριο
Δημοσιεύσεις μελών Δ.Ε.Π. σε περιοδικά



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