FVMQ fluorosilicone rubber is a silicone chain to form the main chain, and the chain containing the trifluoroalkyl group of polymers,
and its polymerization method and dimethyl silicone rubber is similar to the use of cyclic siloxane Ring polymerization method.
Fluorosilicone rubber heat resistance and chemical resistance as other fluorine rubber, but because of its main chain contains
silicon oxygen bond, and the side of the group also contains fluorine atoms, it has both advantages, which can be -60 ℃ -200 ℃
very wide temperature area used, and excellent resistance to fuel oil, small swelling of methanol, but the disadvantage is the physical
and mechanical properties worse than other fluorine rubber.
1. Oil resistance, solvent resistance, chemical resistance
Compared with methyl vinyl silicone rubber, fluorosilicone rubber is excellent in oil resistance, solvent resistance and chemical resistance,
and it is excellent in oil resistance and solvent resistance even when compared with fluororubber. In the same medium, temperature, time after
the dip showed excellent durability, it can be said that fluorosilicone rubber is the only one in -68 ℃ ~ 232 ℃ resistant non-polar medium
of the elastic body. Fluorosilicone rubber is also rich in methanol-containing gasoline, even in the gasoline / methanol mixture,
the vulcanizate hardness, tensile strength, volume changes are very small, after 500h long immersion test, the physical properties Almost no change.

2. Heat resistance
The pyrolysis of fluorosilicone rubber is the same as that of silicone rubber, namely, side chain oxidation, main chain breakage,
side chain thermal decomposition and cause various compound reaction. Since the decomposition products also cause the main chain to break,
so the heat resistance is usually worse than the silicone rubber, at 200 ℃ temperature has begun to oxidize the aging.
It is possible to obtain a significant improvement by adding a small amount of a heat stabilizer such as iron, titanium, rare earth oxides, etc.,
and to have sufficient heat resistance even at a high temperature of 250 ° C. The effect of the temperature on the silicone rubber is larger than
that of the silicone rubber, but smaller than the fluororubber. The service life of fluorosilicone rubber at 150 ℃ × 2000h, 175 ℃ × 5000h,
200 ℃ × 4000h was also studied abroad, and the result was second only to methyl vinyl silicone rubber.

3. Cold resistance
Fluorosilicone rubber and ordinary silicone rubber, low temperature performance is good. Since the fluorosilicone rubber is a linear polymer
composed of soft Si-O as the main chain, the low-temperature characteristic is superior to the fluorine-based rubber having the C-C as the main chain.
Among them, fluorosilicone rubber (LS-2370U) low temperature characteristics of better, brittle temperature as low as -89 ℃, while the general fluorine rubber is about -30 ℃.

4. Electrical performance, radiation resistance
Fluorosilicone rubber and electrical properties similar to ordinary silicone rubber, but particularly valuable in the high temperature,
low temperature, humidity, oil, solvents, chemicals, ozone and other harsh conditions change is very small. Fluorosilicone rubber radiation
resistance is not prominent, but the resistance to radiation aging performance is better than methyl vinyl silicone rubber.

5. Physical and mechanical properties
Fluorosilicone rubber and ordinary silicone rubber, vulcanized rubber mechanical strength (especially tear strength) is relatively low.
Therefore, to improve and improve the strength of fluorosilicone rubber is also an important research topic.

6. Other features
Fluorosilicone rubber weather resistance is very good, even after exposure for 5 years, still maintain good performance.
Ozone is one of the most gases produced when the elastomer is aged, but the fluorosilicone rubber does not find any cracks
or cracks after dynamic or static tests. In addition, fluorine silicone rubber mildew, physiological inert, anticoagulant is also very good.