Thermooxidative Aging Studies on Silicone Rubber and Lifetime Prediction

Article Preview

Abstract:

Silicone rubber have been aged in air while under 25% compression at temperature up to 250°C. These studies examined the compression set of silicone rubber at accelerated (elevated) temperatures and were then used to make predictions about compression set at room temperature. The data obtained could be amenable to timetemperature superposition and Arrhenius treatment. The results suggest the presence of two degradation processes with activation energies of 71.6 kJ mol-1 (for temperatures above 165 °C) and 26.08 kJ mol-1 (for temperatures below 165 °C). Based on the extrapolation of the non-Arrhenius behavior, it was estimated that significant compression set loss would occur after around 67 years at 25 °C.

You might also be interested in these eBooks

Info:

Periodical:

Pages:

11-14

Citation:

Online since:

September 2013

Export:

Price:

Permissions CCC:

Permissions PLS:

Сopyright:

© 2013 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

[1] Bateman L. Olefin oxidation. Q Rev (London) 1954, 8: 147.

Google Scholar

[2] Gillen KT, Celina M, Clough RL, Wise J. Extrapolation of accelerated aging data e Arrhenius or erroneous? Trends Polym Sci, 1997, 5: 250.

Google Scholar

[3] M Patel, A R Skinner. Thermal ageing studies on room temperature vulcanized polysiloxane rubbers. Polymer Degradation and Stability, 2001, 73(3): 399-402.

DOI: 10.1016/s0141-3910(01)00118-5

Google Scholar

[4] M. Celina, K.T. Gillen, R.A. Assink. Accelerated aging and lifetime prediction: Review of non-Arrhenius behavior due to two competing processes. Polymer Degradation and Stability, 2005; 90(3): 395-404.

DOI: 10.1016/j.polymdegradstab.2005.05.004

Google Scholar

[5] Gillen KT, Celina M, Keenan MR. Methods for predicting more confident lifetimes of seals in air environments. Rubber Chem Technol, 2000, 73: 265.

DOI: 10.5254/1.3547590

Google Scholar

[6] Gillen KT, Celina M, Bernstein R. Validation of improved methods for predicting long-term elastomeric seal lifetimes from compression stresses relaxation and oxygen consumption techniques. Polym Degrad Stab, 2003, 82: 25.

DOI: 10.1016/s0141-3910(03)00159-9

Google Scholar

[7] Gillen KT, Bernstein R, Wilson MH. Predicting and confirming the lifetime of o-rings. Polym Degrad Stab, 2005, 87: 257.

Google Scholar

[8] R. Bernstein, K.T. Gillen. Predicting the lifetime of fluorosilicone o-rings. Polymer Degradation and Stability, 94 (2009), 2107-2113.

DOI: 10.1016/j.polymdegradstab.2009.10.005

Google Scholar

[9] ASTM D1415-2005, Standard Test Method for Rubber Property—International Hardness.

Google Scholar

[10] Wang You-shan, Wang Wei, Liu Qiang. Analysis On The Non-Arrhenius Life Prediction Method Of Rubber. Advanced Materials Research, 683 (2013): 366-371.

DOI: 10.4028/www.scientific.net/amr.683.366

Google Scholar