Nitrile Rubber (NBR, Acrylonitrile-Butadiene Rubber)

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Nitrile Rubber (NBR, Acrylonitrile-Butadiene Rubber)
Categories:	Polymer; Thermoset; Rubber or Thermoset Elastomer (TSE)
Material Notes:	Nitrile Rubbers are copolymers of butadiene and acrylonitrile. The term has also been applied to copolymers of other dienes and/or nitriles. Acrylonitrile content may range from 18-50%. Increasing acrylonitrile content leads to higher hardness, strength, abrasion resistance, heat resistance, and oil/fuel resistance and lower resilience and low temperature flexibility. NBR is generally damaged by ozone, chlorinated solvents, ketones, aldehydes, esters, and nitrogen-containing solvents.
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Physical Properties	Metric	English	Comments

Density	1.00 g/cc	0.0361 lb/in³	Base Elastomer
	1.15 - 1.35 g/cc	0.0415 - 0.0488 lb/in³	Compounded

Mechanical Properties	Metric	English	Comments
Hardness, Shore D	30 - 95	30 - 95	Depends on compounding
Tensile Strength, Ultimate	6.89 - 24.1 MPa	1000 - 3500 psi	Reinforced
	0.896 MPa @Temperature 204 °C	130 psi @Temperature 400 °F
	4.83 MPa @Temperature 121 °C	700 psi @Temperature 250 °F
Elongation at Break	400 - 600 %	400 - 600 %	Reinforced
	20 % @Temperature 204 °C	20 % @Temperature 400 °F
	120 % @Temperature 121 °C	120 % @Temperature 250 °F
100% Modulus	3.00 MPa @Strain 100 %	435 psi @Strain 100 %	200 mm/min
Compression Set	5.0 %	5.0 %

Thermal Properties	Metric	English	Comments
CTE, linear	702 µm/m-°C @Temperature 20.0 °C	390 µin/in-°F @Temperature 68.0 °F
Maximum Service Temperature, Air	120 °C	248 °F
Minimum Service Temperature, Air	-30.0 °C	-22.0 °F
Brittleness Temperature	-51.1 °C	-60.0 °F
Glass Transition Temp, Tg	-38.0 °C	-36.4 °F	Typical of rubber with 18% ACN content
	-2.00 °C	28.4 °F	Typical of rubber with 50% ACN content

References for this datasheet.

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