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 |