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Ageing of Rubber?Accelerated Heat Ageing Test Results
Product Code: 1-85957-274-X
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Ageing of Rubber?Accelerated Heat Ageing Test Results
Rapra Technology, 2001
By R.P. Brown, T. Butler and S.W. Hawley
A long-term natural ageing programme was started in 1958 when 19 rubber compounds were exposed at 3 locations. The final sets of test pieces were withdrawn in 1998 giving a total of 40 years of natural ageing. The results of the physical tests carried out at intervals over the period were published in 2000 by Rapra in 'Natural Ageing of Rubber—Changes in Physical Properties over 40 Years'.
This report details the results of accelerated heat ageing studies undertaken on re-mixed samples of those materials studied for the natural ageing study and on the 20 new compounds chosen to represent polymers not available in 1958 and to reflect changes in compounding practice.
In addition to those properties studied for the artificial weathering exposures, compression set and dynamic properties were also measured.
Contents
1. Introduction
2. Materials
2.1 Original Materials
2.2 New Materials
3. Preparation of Test Pieces
4. Physical Tests
5. Exposure of Test Pieces
6. Results
6.1 Presentation
6.2 Uncertainty
6.3 Prediction of Natural Ageing
7. Discussion
7.1 Change with Time
7.1.1 General
7.1.2 Hardness
7.1.3 Modulus
7.1.4 Tensile Strength
7.1.5 Elongation at Break
7.1.6 DMTA
7.1.7 Compression Set
7.2 Predictions
7.2.1 General
7.2.2 Hardness
7.2.3 Modulus
7.2.4 Tensile Strength
7.2.5 Elongation at Break
7.2.6 DMTA
7.2.7 Compression Set
7.2.8 Choice of Analysis Method
7.2.9 Effectiveness of the Predictions
8. Conclusions
References
Price: £225.00 (Ex VAT)
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