Properties of Polybutadiene (BR)
Polybutadiene (BR) is a synthetic elastomer produced through the polymerization of butadiene. Known for its outstanding resilience, abrasion resistance, and flexibility, it is widely used in tire manufacturing, conveyor belts, and industrial rubber products.
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The following table provides a comprehensive list of polybutadiene (BR) properties in both SI and US customary/Imperial units at normal temperature and pressure (NTP).
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| Physical Properties | Metric |
|---|---|
| Category | Elastomer |
| Density | 910 kg/m3 |
| Water Absorption | 0.01 %wt/day |
| Mechanical Properties | Metric |
| Yield Tensile Strength | 13.8 - 17.2 MPa |
| Young’s Modulus (E) | 2.1 - 10.3 GPa |
| Elongation at Break | 450% |
| Shore Hardness (A) | 45 - 80 |
| Electrical Properties | Metric |
| Relative Permittivity (@1 MHz) (εr) | 2.5 |
| Electrical Resistivity | 1015 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.