SBR Rubber vs. PAR

SBR rubber belongs to the thermoset elastomers (rubber) classification, while PAR belongs to the thermoplastics. There are 10 material properties with values for both materials. Properties with values for just one material (18, in this case) are not shown.

For each property being compared, the top bar is SBR rubber and the bottom bar is PAR.

Styrene Butadiene Rubber (SBR, Buna-S)Polyarylate (PAR)

Metric UnitsUS Customary Units

Material Properties

Density, g/cm³		1.1
Density, g/cm³		1.2

Elongation at Break, %		530
Elongation at Break, %		50

Glass Transition Temperature, °C		-30
Glass Transition Temperature, °C		190

Limiting Oxygen Index (LOI), %		18
Limiting Oxygen Index (LOI), %		35

Specific Heat Capacity, J/kg-K		1880
Specific Heat Capacity, J/kg-K		1200

Strength to Weight: Axial, points		3.4
Strength to Weight: Axial, points		16

Strength to Weight: Bending, points		11
Strength to Weight: Bending, points		31

Tensile Strength: Ultimate (UTS), MPa		14
Tensile Strength: Ultimate (UTS), MPa		67

Thermal Conductivity, W/m-K		0.17
Thermal Conductivity, W/m-K		0.18

Thermal Diffusivity, mm²/s		0.082
Thermal Diffusivity, mm²/s		0.13

SBR Rubber vs. PAR

Material Properties

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