In the use of silicone rubber industry products, there are different material matchings for different fields and industries, among which gas-phase collagen materials account for the vast majority. Fluorosilicone rubber products are one of the products. It is mainly used in applications and machinery construction and some heavy industries, so its performance and aging resistance are much better than many rubber and plastic materials. So what do you think about it? Awareness and understanding?

Fluorosilicone is also called trifluoropropylmethylpolysiloxane, also commonly known as special silicone rubber. Its main materials are carbon tetrafluoride and ethylene as raw materials, and can be combined with trimethyltrifluoropropylcyclotrisilane. Oxane is mixed with an appropriate amount of tetramethyltetravinyl ring, tetrasiloxane and a small amount of end-capping agent under a catalyst for solidification and mixing. Compared with silicone rubber materials, its performance has been effectively improved. The finished product The difference in service life is most obvious.

The important characteristics of fluorosilicone rubber products are as follows:
1. Oil resistance, solvent resistance and chemical resistance

Compared with methyl vinyl silicone rubber, fluorosilicone rubber has extremely excellent oil resistance, solvent resistance, and chemical resistance; even compared with fluororubber, its oil resistance and solvent resistance are also good. It shows excellent durability after immersion in the same medium, temperature and time. It can be said that fluorosilicone rubber is the only elastomer that can withstand non-polar media at -68°C ~ 232°C. Fluorosilicone rubber also has relatively good resistance to methanol-containing gasoline. Even in a gasoline/methanol mixed system, the hardness, tensile strength, and volume changes of its vulcanized rubber are very small. After a long 500-hour immersion test, various physical properties Very little has changed either.

2. Heat resistance

The high temperature decomposition of fluorosilicone rubber is the same as that of silicone rubber, namely: side chain oxidation, main chain breakage, side chain thermal decomposition and various composite reactions. Since the decomposition products can also cause the main chain to break, the heat resistance is usually worse than that of silicone rubber, and it has begun to oxidize and age at a temperature of 200°C. However, by adding a small amount of heat stabilizers such as iron, titanium, rare earth oxides, etc., it can be significantly improved, and it has sufficient heat resistance even at a high temperature of 250°C. The effect of temperature on fluorosilicone rubber is greater than that of silicone rubber, but less than that of fluororubber.



3. Cold resistance

Fluorosilicone rubber, like ordinary silicone rubber products, has good low-temperature performance. Since fluorosilicone rubber is a linear polymer composed of soft Si-O as the main chain, its low temperature characteristics are better than those of fluororubber with C-C as the main chain. Among them, fluorosilicone rubber has better low-temperature characteristics, with a brittleness temperature as low as -89°C, while general fluororubber is about -30°C.

4. Electrical properties and radiation resistance

The electrical properties of fluorosilicone rubber are similar to ordinary silicone rubber, but what is particularly valuable is that it changes very little under harsh conditions such as high temperature, low temperature, moisture, oil, solvents, chemicals, and ozone. The radiation resistance of fluorosilicone rubber is not outstanding, but its radiation aging resistance is better than that of methyl vinyl silicone rubber.

5. Physical and mechanical properties

Fluorosilicone rubber is the same as ordinary silicone rubber. The mechanical strength of vulcanized rubber (especially tear strength) is relatively low. Therefore, improving and increasing the strength of fluorosilicone rubber is also an important research topic.

6. Other characteristics

Fluorosilicone rubber has excellent weather aging resistance and still maintains good performance even after 5 years of exposure. Ozone is one of the most generated gases when elastomers age, but no cracks or cracks have been found in fluorosilicone rubber after dynamic or static tests.

To sum up, it can be seen that compared with ordinary silicone products, fluorosilicone rubber is more prominent in its performance and lifespan. If the normal service life of ordinary silicone products reaches the bearing capacity of fluorosilicone rubber, the aging capacity will be accelerated and the tensile strength will decrease. Large deformation and other phenomena occur. The difference between fluorine rubber and general gas-phase adhesives is that the raw material additives of the materials are different, resulting in different properties. The purity of the added raw materials is required to be higher, and the service life of the finished parts is also longer.