Effect of accelerated aging on the viscoelastic properties of a medical grade silicone
作者： Aziza Mahomed , David W.L. Hukins , Stephen N. Kukureka
DOI: 10.3233/BME-151538
关键词:
摘要: The viscoelastic properties of cylinders (diameter 5 mm, height 2.2 ± 0.2 mm) Nagor silicone elastomer medium hardness, were investigated before and after the specimens had undergone accelerated aging in saline solution at 70°C for 38, 76 114 days (to simulate 37°C, 1, 2 3 years, respectively). All sets immersed physiological 37°C during testing measured using dynamic mechanical analysis (DMA). A sinusoidal cyclic compression 40 N ± 5 N was applied over a frequency range, f, 0.02-25 Hz. Values storage, E', loss, E″, moduli found to depend on f; dependence E' or E″ logarithm (base 10) f represented by second-order polynomial. After aging, values did not increase significantly (p<0.05). Furthermore, scanning electron microscopy (SEM) showed that affect surface morphology silicone. Attenuated total reflectance Fourier transform infra-red spectroscopy (ATR-FTIR) negligible effect chemical structures material. Differential calorimetry (DSC) no changes bulk silicone, following aging.
medra.org 参考文章(26)
Takayuki Murayama, Dynamic mechanical analysis of polymeric material ,(1978)
B. Doležel, L. Adamírová, Z. Náprstek, P. Vondráček, In vivo degradation of polymers: I. Change of mechanical properties in polyethylene pacemaker lead insulations during long-term implantation in the human body Biomaterials. ,vol. 10, pp. 96- 100 ,(1989) , 10.1016/0142-9612(89)90039-2
I. M. Ward, Mechanical properties of solid polymers ,(1971)
R.G. Craig, A. Koran, R. Yu, Elastomers for maxillofacial applications Biomaterials. ,vol. 1, pp. 112- 117 ,(1980) , 10.1016/0142-9612(80)90010-1
H. Murata, N. Taguchi, T. Hamada, M. Kawamura, J.F. McCabe, Dynamic Viscoelasticity of Soft Liners and Masticatory Function Journal of Dental Research. ,vol. 81, pp. 123- 128 ,(2002) , 10.1177/154405910208100208
John D. Ferry, Viscoelastic properties of polymers ,(1961)
A. Mahomed, N. M. Chidi, D. W. L. Hukins, S. N. Kukureka, D. E. T. Shepherd, Frequency dependence of viscoelastic properties of medical grade silicones. Journal of Biomedical Materials Research Part B. ,vol. 89, pp. 210- 216 ,(2009) , 10.1002/JBM.B.31208
N.J.A. Jepson, J.F. McCabe, R. Storer, Age changes in the viscoelasticity of permanent soft lining materials. Journal of Dentistry. ,vol. 21, pp. 171- 178 ,(1993) , 10.1016/0300-5712(93)90028-O
Anne Simmons, Jari Hyvarinen, Ross A Odell, Darren J Martin, Pathiraja A Gunatillake, Kathryn R Noble, Laura A Poole-Warren, Long-term in vivo biostability of poly(dimethylsiloxane)/poly(hexamethylene oxide) mixed macrodiol-based polyurethane elastomers. Biomaterials. ,vol. 25, pp. 4887- 4900 ,(2004) , 10.1016/J.BIOMATERIALS.2004.01.004
Aziza Mahomed, David W.L. Hukins, Stephen N. Kukureka, Duncan E.T. Shepherd, Effect of accelerated aging on the viscoelastic properties of Elast-Eon™: A polyurethane with soft poly(dimethylsiloxane) and poly(hexamethylene oxide) segments Materials Science and Engineering: C. ,vol. 30, pp. 1298- 1303 ,(2010) , 10.1016/J.MSEC.2010.07.014