Fluorine rubber performance characteristics

Fluorine rubber performance characteristics There are 26 important types of fluorinated rubber. Type 246. Type 23; tetrapropylene fluorine rubber. Fluorosilicone rubber. Important characteristics of fluorine rubber 1. Chemical stability Fluorine rubber has high chemical stability and is one of the best material resistance properties of all elastomers at present. 26 type fluorine rubber oil-resistant base oil. Diester oil. Silicon ether silicic acid oil, resistant to inorganic acid. Resistant to most organic solutions, but not resistant to low molecular ketones, ethers, esters, amines, ammonia, and hydrofluoric acid. Chlorosulfonic acid. Phosphoric acid gear oil. Type 23 is unique, and its resistance to strong oxidizing inorganic acids, such as smoke nitric acid and sulfuric acid, is better than type 26. 2. Excellent heat resistance Like silicone, the heat resistance of fluorine rubber can be said to be the best among elastomers at present. 246>26>23 3. Good aging resistance It has excellent weather aging resistance and ozone resistance. 4. Excellent vacuum characteristics Excellent vacuum characteristics. 5. Good mechanical properties It has excellent physical and mechanical properties. The compression set at high temperature is larger, but if the criteria are the same, both nitrile and neoprene are larger than type 26 rubber. 6. Better electrical properties Type 23 fluorine rubber has good electrical properties, and its water absorption rate is lower than other elastomers, so it can be used as a better electrical insulating material. Fluorine rubber is generally only suitable for low-frequency temperature that affects its electrical performance. From 24 ° C to 184 ° C, the insulation resistance is reduced by 3500 times. 7. Low gas permeability Fluorine rubber has great solubility in gas, but the diffusion rate is very small, so the overall air permeability is also very small. It is reported that the 26-type fluorine rubber has very strong air permeability to oxygen, nitrogen, carbon dioxide and butyl rubber at 30 ° C, which is better than that of neoprene rubber. Natural rubber. 8. Poor low temperature performance Due to its own chemical structure, fluorine rubber has poor low temperature performance. For example type 23-11 Tg>0°C. The practical application of low temperature performance of fluorine rubber is generally expressed by brittleness temperature and reduction of cold resistance index. The brittleness temperature is greatly influenced by the secret recipe of the rubber and its commodity shape. 9. Poor radiation resistance Among elastomers, fluorine rubber has relatively poor radiation resistance. The radiation effect of 26 type rubber is reflected in the crosslinking effect, and the 23 type rubber is reflected in the cracking effect. 10. As a kind of synthetic rubber, fluorine rubber has excellent chemical resistance, oil resistance, heat resistance, long-term use temperature of 200°C or above. From the chemical structure point of view, fluorine rubber content is high, strong C-F bond, no saturated bond and other characteristics, and then has excellent heat resistance and excellent oil resistance.