PAR vs. SBR Rubber

PAR belongs to the thermoplastics classification, while SBR rubber belongs to the thermoset elastomers (rubber). 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 PAR and the bottom bar is SBR rubber.

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

Metric UnitsUS Customary Units

Material Properties

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

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

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

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

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

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

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

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

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

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

PAR vs. SBR Rubber

Material Properties

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