Analyze the cause of rubber aging

Yangzhou Xintianhui Electronic Technology Co., Ltd. is a professional manufacturer integrating production, development and sales. It has accumulated rich experience in production and development in the production process for many years. The rubber and plastic testing instruments produced by our company include more than 100 kinds of products such as electronic tensile machine series, rubber hardness tester series, thickness gauge series, punching machine, abrasion machine, aging box, vulcanization instrument and low temperature brittleness testing machine.

The rubber tension machine can perform tests such as stretching, peeling, shrinking, shearing, rupture, debunking, fatigue, etc. of non-metal, non-woven fabric, polymer materials, etc., for the setting of material mechanical function measurement, adopting microcomputer operation and correcting excellent The electronic control skills, standardization, unitized design, with correct operation, high measurement accuracy, equipped with active, can be light and green to replace the attachment, easy to after-sales service and other characteristics. Next, the engineers of Yangzhou Xintianhui will summarize the factors that lead to rubber aging:

1. Oxygen: Oxygen in the rubber has a radical linkage reaction with the rubber branch, and the branch chain is broken or extremely crosslinked, resulting in a change in rubber function. Oxidation is one of the important factors in rubber aging.

2. Ozone: The chemical activity of ozone is much higher than that of oxygen, and it is more destructive. It is the same as breaking the branch chain, but the damage of ozone to rubber varies with the deformation of rubber. When using a rubber that is deformed (primarily unsaturated rubber), the cracks in the orientation and the straightness of the stress can be called "ozone cracking"; when the rubber is deformed, only the oxide film is synthesized orally without cracking. .

3. Heat: Raising the temperature can cause thermal cracking or thermal crosslinking of the rubber, but the hot roots are still used for activation, raising the oxygen dispersion rate and activating the oxidation reaction, thereby accelerating the rubber oxidation reaction rate, which is generally present. A type of aging signs - thermal oxygen aging.

4. Machine stress: Under the repeated use of machine stress, the rubber branch chain will be broken to synthesize free hydrazine, and the oxidative chain reaction will be triggered to become a force chemical process. Which machine can dominate the machine break chain and machine activation oxidation process? It depends on the premise it is in. In addition, it is easy to cause ozone cracking under stress.

5. Moisture: The use of water has two aspects: rubber is easy to be destroyed when it is raining or immersed in water for a long time. This is because water-soluble substances and hydrophilic groups in rubber are dissolved and hydrolyzed by water extraction. Or ingestion and other factors. Especially in the case of water soaking and poor gas exposure, it will accelerate the destruction of rubber.

6. Oil: In the process of utilization, if the oil medium is used for a long time, the oil can penetrate into the rubber to cause it to swell, resulting in a decrease in the strength and other mechanical functions of the rubber. The oil can swell the rubber. It is because the oil penetrates the rubber and the branches are dispersed to change the network structure of the vulcanized rubber.

7. Others: chemical medium, variable metal ions, high-energy radiation, electricity, etc.

The above are several factors that cause rubber aging, and I hope to bring some help to rubber processors. If you are interested in our company's products, you can Yangzhou Xintianhui.