The ozone aging test box can be used for rubber products such as vulcanized rubber, thermoplastic rubber, cable insulation jackets, etc., under static tensile deformation, exposed to closed and non-illuminated air containing constant ozone concentration and constant temperature test box Time to test the sample, the degree of cracks or other performance changes from the surface of the sample to evaluate the resistance of the rubber to ozone aging.
The measurement methods of ozone aging test box include ozone iodine method, ozone ultraviolet absorption method, ozone electrochemical method, ozone colorimetric method. The following will introduce the principles and functions of these methods.
Ozone iodometric method of ozone aging test box:
In the past, the most classic measurement method used ozonized gas to free iodine in potassium iodide solution to develop color, and then reduced to colorless by sodium thiosulfate titration, and calculated the ozone concentration based on the number of sodium thiosulfate consumed. This method is intuitive in color development and cheap in equipment. However, various chemical test equipment such as medicines, bottles, measuring cylinders, balances, and burettes are used. It is not convenient to use and is easily interfered by other oxidants (such as N0, CL, etc.) It is still the standard measurement method in China.
Ozone ultraviolet absorption method of ozone aging test box:
In the past, the most classic measurement method used ozonized gas to free iodine in potassium iodide solution to develop color, and then reduced to colorless by sodium thiosulfate titration, and calculated the ozone concentration based on the number of sodium thiosulfate consumed. This method is intuitive in color development and cheap in equipment. However, various chemical test equipment such as medicines, bottles, measuring cylinders, balances, and burettes are used. It is not convenient to use and is easily interfered by other oxidants (such as N0, CL, etc.). It is still the standard measurement method in China.
Ozone electrochemical method of ozone aging test box:
In the past, the most classic measurement method used ozonized gas to free iodine in potassium iodide solution to develop color, and then reduced to colorless by sodium thiosulfate titration, and calculated the ozone concentration based on the number of sodium thiosulfate consumed. This method is intuitive in color development and cheap in equipment. However, various chemical test equipment such as medicines, bottles, measuring cylinders, balances, and burettes are used. It is not convenient to use and is easily interfered by other oxidants (such as N0, CL, etc.). It is still the standard measurement method in China.
Ozone colorimetry of ozone aging test chamber:
The chemical method is the same as the iodometric method. It uses the color development or decolorization of ozone to chemical reagents to determine the ozone concentration. It can be used with various chemical substances such as potassium iodide, o-tolidine or indigo dye. It can be directly visually compared with a standard color tube or colorimetric disc. It can also be detected by a spectrophotometer. This method is simple and easy, and the cost is not high. The current level of China is suitable for promotion, but the test drugs are disposable consumables.
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