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   IndiaRubberDirectory.com > Rubber Engineering > Elastromer Properties
Major Elastomers and Properties
             
Type Isoprene SBR NEOPRENE BUTYL NITRILE  ETHYLENE
Rubbers        COPOLYMERS EPDM EPM
NR and IR            
             
Specific Gravity……… 1 0.9 1 1 1   1
Tensile Strength, psi    
     Pure Gum ………. > 1000 < 500 > 3000 > 1500 > 500 < 400 < 300
     Reinforced ………. > 4000 > 3000 > 3000 > 2000 > 3000 > 3000 > 3000
             
Practical shore A      
     Hardness Range… 30-100 40-100 40-95 40-75 30-100 45-95 45-95
Resilience          
     Room Temperature … E G G P F G G
     Hot…………………… E G G G F G G
Tear Resistance……….. G-F F G G F G G
             
Abrasion Resistance….. E G-E E F-G F G-E G-E
Atmospheric Aging Resistance… P-E* P-E* E F-G F G-E G-E
Oxidation Resistance…….. G G G G-E F E E
Heat Resistance………….. G G G G-E G G-E G-E
Low Temperature Flexibility… E G F F F G-E G-E
Compression Set…………….. F-G F P(GN) F G E E
    G(W)        
Permeability………………….. F F G E E F F
Flame Resistance ………….. P-G* P-G* E P P P-E* P-E*
Acid Resistance      
      Dilute ……………………. G F-G E E G E E
      Concentrated ………….. F F-G G E F G G
Moisture Resistance ………. F-G G-E F F F E E
             
Solvent Resistance    
       Hydrocarbons   ………….. P P G** P* F P P
       Oxygenated Solvents …… G G P G P G G
      G**      
       Oil and Gasoline ……….. P P G P* E P P
       Animal and Vegetable Oils P-G P-G G E E G G
Dielectric Properties …………. G-E G P G-E P G-E E
             

 

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