PVMQ - Phenyl Silicone
Clwyd reference | PVMQ |
ASTM classification | PVMQ |
Phenyl silicone – or methyl phenyl silicone – is a polydimethylsiloxane with phenyl groups. The phenyl content improves various properties such as oxidation resistance, thermal stability, shear resistance and optical clarity. | |
Typical applications | Typical applications for use with connectors for cables and sealing for automotive and aerospace markets where ultra low temp is required. |
Advantages | The most prominent characteristic is flexibility at extreme temperatures, with operational ranges between -90 °F to +500 °F. Also, by blending phenyl silicone with silicone and fluorosilicone elastomers, we can optimise properties of the overall material. |
Disadvantages | Poor impermeability to gas, not resistant to hydrocarbon-based fuels, aromatic hydrocarbons (benzene, toluene), low molecular weight silicone oils, strong acids and alkalis. It is regarded as mechanically weak. |
Available hardness range (Shore A) | 50 - 85 |
Upper continuous service temp. | 225°C |
Min. temp. for sealing applications | -70°C |
Minimum non-brittle temp. | -80°C |
Tensile strength (up to) | 8 MPa |
Elongation at break (up to) | 500% |
Price Bracket | Low |
ASTM 1 Oil | Average |
ASTM 2 Oil | Average |
ASTM 3 Oil | Average |
Kerosene | None |
Liquid B | None |
Liquid 101 | None |
Phosphate ester | None |
Ketone | None |
Toluene | None |
Iso-octane | None |
Methanol | Excellent |
Acid (weak) | None |
Acid (strong) | None |
Base (weak) | Average |
Base (strong) | None |
Hydrogen sulphide | Average |
Steam | Average |
Ozone | Excellent |
Radiation | Average |