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.

Looking to buy polymers?
Check pricing and availability through our trusted partner:

Online Metals - High-quality polymers with fast shipping

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.

Table of Polyurethane Properties
Physical Properties
Metric
CategoryThermoset
Density1050 - 1250 kg/m3
Water Absorption1 %wt/day
Mechanical PropertiesMetric
Ultimate Tensile Strength29 - 49 MPa
Elongation at Break10 - 21%
Thermal PropertiesMetric
Thermal Conductivity0.21 W/m·K
Specific Heat Capacity (Cp)1800 J/kg·K
Coefficient of Thermal Expansion (αL)10-4 - 2×10-4 1/°C
Electrical PropertiesMetric
Electrical Resistivity1012 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)

Related Pages
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.