Properties of Phenol Formaldehyde (PF)
Phenol formaldehyde (PF), also known as phenolic resin, is a widely used thermosetting polymer produced from the reaction of phenol and formaldehyde. Known for its excellent thermal stability, low water absorption, and robust electrical insulation properties.
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The following table provides a comprehensive list of phenol formaldehyde (PF) properties in both SI and US customary/Imperial units at normal temperature and pressure (NTP).
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| Physical Properties | Metric |
|---|---|
| Category | Thermoset |
| Density | 1360 kg/m3 |
| Water Absorption | 0.2 %wt/day |
| Thermal Properties | Metric |
| Thermal Conductivity | 0.25 W/m·K |
| Coefficient of Thermal Expansion (αL) | 1.6×10-5 1/°C |
| Electrical Properties | Metric |
| Relative Permittivity (@1 MHz) (εr) | 5.0 - 6.5 |
| Electrical Resistivity | 1012 Ω·cm |
| Dielectric Field Strength (Ed) | 120 - 160 kV/cm |
Unless stated otherwise, all values are taken at room temperature (approximately 20°C or 68°F) and 1 atm pressure. (1 atm = 101,325 Pa)
References: 1) Cardarelli, François. Materials Handbook: A Concise Desktop Reference. Switzerland: Springer International Publishing, 2018. 2) CRC Handbook of Chemistry and Physics, 97th Edition. United Kingdom: CRC Press, 2016-2017. 3) A.M. Howatson, P.G. Lun, J.D. Todd, P.D. Engineering Tables and Data. United Kingdom: University of Oxford, Department of Engineering Science, 2009.