在各种工业材料中, 硅胶橡胶板在各个领域都有广泛的应用，因为它们的独特特性（例如高温耐性和耐腐蚀性）. 然而, 当暴露于特定环境时, 臭氧抵抗性能成为关键指标. 所以, 如何测试有机硅橡胶板的臭氧耐药性能? 他们遵循什么标准?
臭氧, 作为强氧化剂, 具有极强的腐蚀性，可以与许多物质做出反应, 加速材料的老化和损坏. For silicone rubber sheets, if they are exposed to an ozone-containing environment for a long time, their molecular structure may be damaged, leading to a decline in physical properties such as becoming brittle, cracking, and reduced strength, which seriously affects their service life and reliability. 所以, testing the ozone resistance performance of silicone rubber sheets is particularly important, as it helps us understand the material’s performance in an ozone environment in advance, providing a strong basis for product design and application.
Currently, the ozone resistance performance testing of silicone rubber sheets is mainly carried out in accordance with relevant industry standards. These standards clearly stipulate each step of the testing process to ensure the accuracy and comparability of the test results.
In terms of testing methods, the common ones include static tensile test method and dynamic tensile test method.
The static tensile test method involves fixing the silicone rubber sheet sample in a specific fixture to keep it in a certain tensile state, and then placing it in a closed test chamber filled with ozone. The purpose of tensile is to create stress concentration areas in the silicone rubber sheet, as ozone usually tends to cause cracks in these weak areas. The ozone concentration, 温度, and humidity in the test chamber are strictly controlled, 例如, the ozone concentration is usually precisely set within a specific range, 例如50pphm, 100PPHM, ETC。, 温度可以在40℃左右控制, 而且湿度也保持在相对稳定的水平, 模拟实际使用或特定的环境条件. 在整个测试过程中, 连续观察样品表面的变化, 以及发生裂缝的时间和裂缝的发展. 达到预定的测试时间后, 取出样品, 并根据其表面上的破裂程度或其他性能变化评估了硅树脂橡胶板的臭氧抗性性能等级.
动态拉伸测试方法基于静态拉伸方法, 但是样本在拉伸状态下经过周期性拉伸和收缩运动, 这更符合实际使用中有机硅橡胶板的动态力条件. This method is used to examine its ability to resist ozone erosion under dynamic conditions. The testing principle and control of environmental conditions are similar to the static tensile test, but it can more comprehensively reflect the ozone resistance performance of the material.
＞将电子邮件发送到sales@jingdongrubber.com,立即获取报价
In terms of judgment criteria, the standards provide detailed descriptions of the surface changes corresponding to different grades of ozone resistance performance.
例如, 一年级的臭氧抗性性能表明，在指定的测试时间和臭氧浓度下，样品表面上几乎没有明显的裂缝或极为细的裂纹; 二级允许少量短裂缝, 但是裂纹长度和分布密度在一定范围内; 等等. 等级越低, 臭氧抵抗性能越差. 通过将测试样本与标准中的描述和图片进行比较, the ozone resistance performance grade of the silicone rubber sheet can be accurately determined.
In addition to the above conventional testing standards, in some special industry applications, more strict or targeted testing norms are formulated based on specific usage scenarios and requirements.
例如, in the aerospace field, since silicone rubber sheets may be used in critical parts such as aircraft seals, the requirements for ozone resistance performance are extremely high. During testing, 不仅臭氧浓度增加，测试时间延长, 但是添加了更多的性能测试项目, 例如比较测试前后的密封性能, 为了确保有机硅橡胶板可以在极端臭氧环境中保持良好的性能并确保飞行安全.
Jingdong Rubber Co., 有限公司. 是一家专业的橡胶板生产厂家, 生产 硅橡胶板, 天然橡胶板, 氟橡胶板, 氯丁橡胶板, 绝缘橡胶板,三元乙丙橡胶板, 耐油橡胶板, 防静电橡胶板, 阻燃橡胶板, 导电橡胶板, 防滑橡胶板, 和牛棚垫, ETC. 和 40 多年行业经验, 畅销国内外. 如果您需要我们的任何产品,请发送电子邮件至 sales@jingdongrubber.com.