Polymers Textiles

Ageing of Rubber : Accelerated Weathering and Ozone Test by R.P. Brown, T. Butler, S.W. Hawley

By R.P. Brown, T. Butler, S.W. Hawley

A long term traditional getting older programme was once begun in 1958 while 19 rubber compounds have been uncovered at three destinations. the ultimate units of try items have been withdrawn in 1998 giving a complete of forty years of traditional growing old. This record information the result of the unreal weathering and ozone publicity checks and makes comparisons with the consequences after usual getting older. the next homes have been chosen for tracking the substitute weathering exposures; tensile power, elongation at holiday, pressure at a hundred% elongation, tension at three hundred% elongation and microhardness.

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00 0 30 60 90 120 150 180 Weathering Period (Days) 54 Ageing of Rubber - Accelerated Weathering and Ozone Test Results Styrene Butadiene Rubber - Good Ageing Compound H (styrene butadiene rubber - good ageing) Table 1. 70 -8 Hardness (IRHD) Tensile Properties Compound H (styrene butadiene rubber - good ageing) Table 2. 3 7. 00 0 30 60 90 120 150 180 Weathering Period (Days) 58 Ageing of Rubber - Accelerated Weathering and Ozone Test Results Butyl Rubber - General Purpose Compound J (butyl rubber - general purpose) Table 1.

24 Ageing of Rubber - Accelerated Weathering and Ozone Test Results APPENDIX 2 WEATHERING RESULTS © Copyright 2001 Rapra Technology Limited 25 26 Ageing of Rubber - Accelerated Weathering and Ozone Test Results Natural Rubber - Standard Compound A (natural rubber - standard) Table 1. 5 29 Hardness (IRHD) Tensile Properties Compound A (natural rubber - standard) Table 2. 0 0 30 60 90 120 150 180 Weathering Period (Days) 30 Ageing of Rubber - Accelerated Weathering and Ozone Test Results Natural Rubber - Good Ageing Compound B (natural rubber - good ageing) Table 1.

0 0 30 60 90 120 150 180 Weathering Period (Days) 50 Ageing of Rubber - Accelerated Weathering and Ozone Test Results Styrene Butadiene Rubber - General Purpose Compound G (styrene butadiene rubber - general purpose) Table 1. 66 28 Hardness (IRHD) Tensile Properties Compound G (styrene butadiene rubber - general purpose) Table 2. 2 7. 00 0 30 60 90 120 150 180 Weathering Period (Days) 54 Ageing of Rubber - Accelerated Weathering and Ozone Test Results Styrene Butadiene Rubber - Good Ageing Compound H (styrene butadiene rubber - good ageing) Table 1.

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