Properties of Polyurethane (PUR)
Polyurethane (PUR) is a highly adaptable thermoset polymer formed from organic units joined by urethane links. Known for its durability, flexibility, and resistance to chemicals, PUR is used in a wide array of products including insulation foams, adhesives, coatings, and elastomers.
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The following table provides a comprehensive list of polyurethane (PUR) properties in both SI and US customary/Imperial units at normal temperature and pressure (NTP).
Click on the button to switch between Metric and Imperial units.
| Physical Properties | Metric |
|---|---|
| Category | Thermoset |
| Density | 1050 - 1250 kg/m3 |
| Water Absorption | 1 %wt/day |
| Mechanical Properties | Metric |
| Ultimate Tensile Strength | 29 - 49 MPa |
| Elongation at Break | 10 - 21% |
| Thermal Properties | Metric |
| Thermal Conductivity | 0.21 W/m·K |
| Specific Heat Capacity (Cp) | 1800 J/kg·K |
| Coefficient of Thermal Expansion (αL) | 10-4 - 2×10-4 1/°C |
| Electrical Properties | Metric |
| Electrical Resistivity | 1012 Ω·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.