What is fluorosilicone rubber?
Like silicone, fluorosilicone rubber is a long-lasting elastomer that is stable and compression set resistant across temperature extremes, but unlike silicone, fluorosilicone contains trifluoropropyl groups that enhance its chemical resistance to non-polar solvents, fuels, oils, acids, and alkaline chemicals.
What is Vmq rubber?
VMQ (Silicones) are a group of elastomeric materials made from silicone, oxygen, hydrogen, and carbon. Extreme temperature range and low temperature flexibility are characteristics of silicone compounds. High strength compounds have also been made, but their strength does not compare to conventional rubber.
What is modulus of rubber?
What is the modulus of rubber? The moduli of rubber samples are typically expressed as the stress needed to strain a rubber sample for 25%, 50%, 100%, 200% and 300%. This is reported as Modulus 25%, Modulus 50% etc. The higher these percentages are, the stiffer the material is.
What is density of silicone rubber?
Silicone Rubber
| Property | Minimum Value (S.I.) | Maximum Value (S.I.) |
|---|---|---|
| Density | 1.1 | 2.3 |
| Energy Content | 200 | 300 |
| Bulk Modulus | 1.5 | 2 |
| Compressive Strength | 10 | 30 |
What does Vmq stand for?
VMQ
| Acronym | Definition |
|---|---|
| VMQ | Virtual Memory Query |
| VMQ | Virginia Medical Quarterly (scholarly journal) |
What is FVMQ material?
FVMQ (Fluorosilicone) combines the good high- and low-temperature properties of silicone with limited fuel and oil resistance. Fluorosilicones provide a much wider operational temperature range than Fluorocarbon rubbers.
What is the properties of rubber?
It has excellent tensile, elongation, tear resistance and resilience. It has good abrasion resistance and excellent low temperature flexibility. Without special additives, it has poor resistance to ozone, oxygen, sunlight and heat. It has poor resistance to solvents and petroleum products.
What is the property of silicon?
1.1. Properties of Silicon
| Atomic number of Si | 14 | |
|---|---|---|
| Si atoms | 5×1022 | atoms*cm−3 |
| Melting point | 1687 | K |
| Specific density | 2.329 | g*cm−3 at 298 K |
| Specific density (liquid) | 2.57 | g*cm−3 |
How much fluorine is in fluorosilicone rubber?
Fluorosilicone usually contains 23 to 28 percent fluorine. FVMQ has almost the same mechanical and physical properties as conventional silicone rubber and its low-temperature flexibility is just as good.
What can fluorosilicone be used for in a sealer?
The addition curing of fluorosilicone, which produces no decomposition products, is one of the newest curing methods and is mostly used for liquid silicones. FVMQs offer good resistance to automotive and aviation oils, fuels and many other chemicals and solvents. As such, fluorosilicones are ideal for use in sealing technology.
How are silicone elastomers different from silicone rubbers?
They also have lower hot air resistance when compared to silicone rubbers (VMQs). Like silicone elastomers, they have high heat and oxidative stability, outstanding low temperature flexibility, and are resistant to heat, ozone and sunlight (UV).