亚洲精品综合日韩中文字幕网站_精品综合久久久久97_中文在线天堂网www_久久精品免费一区二区三区_91久久国产综合精品女同国语_久久资源总站在线国产成人

氧化稳定性测定仪

Testing oxidation stability of elastomeres, rubber and miscellaneous plastics, such as cable coatings, is described in the German DIN 53 508 or DIN VDE 0472 as well as in IEC 811-1-2; (method: pressure chamber). This test simulates the ageing behaviour of materials in a short-term study. Materials are exposed to pure oxygen at 70℃, 21 bars or to air at 127℃ / 150℃ at 5.5 bars for one day or more in a pressure chamber. Mechanical properties, such as tensile strength and hardness, are examined before and after exposure. The results are placed in relationship to one another and the resulting characteristic number is a measure of the ageing behaviour.