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 common growing old programme used to be began in 1958 while 19 rubber compounds have been uncovered at three destinations. the ultimate units of try out items have been withdrawn in 1998 giving a complete of forty years of average getting old. This record info the result of the synthetic weathering and ozone publicity checks and makes comparisons with the implications after normal getting old. the next homes have been chosen for tracking the bogus weathering exposures; tensile energy, elongation at holiday, rigidity at a hundred% elongation, rigidity at three hundred% elongation and microhardness.

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55 -12 Hardness (IRHD) Tensile Properties Compound D (natural rubber - mineral filler (heavy loaded)) Table 2. 00 0 30 60 90 120 150 180 Weathering Period (Days) 42 Ageing of Rubber - Accelerated Weathering and Ozone Test Results Styrene Butadiene Rubber - General Purpose Compound E (styrene butadiene rubber - general purpose) Table 1. 6 24 Hardness (IRHD) Tensile Properties Compound E (styrene butadiene rubber - general purpose) Table 2. 0 0 30 60 90 120 150 180 Weathering Period (Days) 46 Ageing of Rubber - Accelerated Weathering and Ozone Test Results Styrene Butadiene Rubber - Good Ageing Compound F (styrene butadiene 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.

9 Hardness (IRHD) Tensile Properties Compound F (styrene butadiene rubber - good ageing) Table 2. 0 5. 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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