Chloroprene Rubber (CR, Neoprene)
CR rubber is a thermoset elastomer or rubber material. It has the lowest heat capacity and a moderately low tensile strength among rubber materials. The graph bars on the material properties cards below compare CR rubber to other rubber materials (top) and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Elongation at Break
380 %
Tensile Strength: Ultimate (UTS)
11 MPa 1.5 x 103 psi
Thermal Properties
Glass Transition Temperature
-45 °C -49 °F
Maximum Temperature: Autoignition
410 °C 760 °F
Maximum Temperature: Decomposition
350 °C 650 °F
Maximum Temperature: Mechanical
130 °C 260 °F
Specific Heat Capacity
1120 J/kg-K 0.27 BTU/lb-°F
Thermal Conductivity
0.19 W/m-K 0.11 BTU/h-ft-°F
Otherwise Unclassified Properties
Density
1.5 g/cm3 94 lb/ft3
Limiting Oxygen Index (LOI)
26 %
Common Calculations
Strength to Weight: Axial
1.9 points
Strength to Weight: Bending
7.1 points
Thermal Diffusivity
0.11 mm2/s
Followup Questions
Further Reading
Rubber Formulary, The, Peter A. Ciullo and Norman Hewitt, 1999