Comparative Properties of Typical Commercial Elastomers
Polyisoprene, Styrene Butadiene, Isobutylene Isoprene, Polybutadiene, & Butadiene Acrylonitriles
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Comparative Properties of Typical Commercial Elastomers
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CHEMICAL NAME
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Polyisoprene
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Styrene Butadiene
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Isobutylene Isoprene
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Polybutadiene
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Butadiene Acrylonitrile
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COMMON NAME
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Natural Rubber
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SBR or GR-S or
Buna S |
Butyl
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Butadiene
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Nitrile (Buna N)
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Material Designation
(ASTM D 2000, SAE J 200 Classification) |
AA
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AA
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AA
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AA
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BF, BG, BK, CH
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Tensile Strength, Mpa
(psi) |
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Pure Gum
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Over 20.7 (3,000)
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Below 6.9 (1,000)
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Over 10.3 (1,500)
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Below 6.9 (1,000)
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Below 6.9 (1,000)
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Black Loaded Stocks
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Over 20.7 (3,000)
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Over 13.8 (2,000)
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Over 10.8 (2,000)
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Over 10.8 (2,000)
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Over 10.8 (2,000)
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Hardness Range
(Durom, A) |
30-90
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40-90
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40-75
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40-80
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40-95
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Specific Gravity
(Base Material) |
0.93
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0.94
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0.92
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0.94
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1.00
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Adhesion to Metals
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Excellent
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Excellent
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Good
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Excellent
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Excellent
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Adhesion to Fabrics
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Excellent
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Good
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Good
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Good
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Good
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Tear Resistance
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Good to Very Good
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Fair
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Good
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Good
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Fair
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Abrasion Resistance
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Excellent
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Good to Excellent
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Good
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Excellent
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Good
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Compression Set
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Good
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Good
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Fair
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Very Good
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Good
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Rebound
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Cold
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Excellent
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Good
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Poor
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Outstanding
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Good
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Hot
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Excellent
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Good
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Very Good
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Excellent
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Good
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Dielectric Strength
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Excellent
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Excellent
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Excellent
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Good
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Poor
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Electrical Insulation
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Good to Excellent
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Good to Excellent
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Good to Excellent
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Good to Excellent
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Poor
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Permeability to Gases
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Fairly Low
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Fairly Low
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Very Low
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Good
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Low
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Acid Resistance
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Diluted
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Fair to Good
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Fair to Good
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Excellent
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Fair to Good
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Good
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Concentrated
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Fair to Good
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Fair to Good
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Good
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Fair to Good
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Good
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Solvent Resistance
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Aliphatic Hydrocarbons
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Poor
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Poor
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Poor
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Poor
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Excellent
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Aromatic Hydrocarbons
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Poor
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Poor
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Poor
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Poor
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Good
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Oxygenated (Keytones, etc.)
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Fair to Good
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Good
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Good
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Poor
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Poor
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Laquer Solvents
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Poor
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Poor
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Fair to Good
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Poor
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Fair
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Resistance to
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Swelling in Lubricating Oil
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Poor
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Poor
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Poor
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Poor
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Very Good
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Oil & Gasoline
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Poor
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Poor
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Poor
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Poor
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Excellent
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Animal & Vegetable Oils
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Poor to Good
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Poor to Good
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Very Good
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Poor
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Very Good
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Water Absorption
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Very Good
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Good to Very Good
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Very Good
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Very Good
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Good
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Oxidation
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Good
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Fair
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Excellent
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Good
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Good
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Ozone
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Poor to Fair
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Poor
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Excellent
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Poor
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Fair
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Sunlight Aging
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Poor
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Poor
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Very Good
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Poor
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Poor
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Heat Aging
(Upper Limit Cont. Service) |
85°C (185°F)
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90°C (194°F)
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120°C (248°F)
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115°C (239°F)
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Flame
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Poor
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Poor
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Poor
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Poor
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Poor
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Heat
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Good
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Fair to Good
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Very Good
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Fair
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Good
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Cold
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Excellent
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Very Good
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Good
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Very Good
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Fair to Good
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