Elastomers

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Elastomers or rubbers are amorphic polymers with crosslinked linear chain molecules that ensures elasticity and the return of the material to its original shape when load is removed.

Typical properties for some of the most commonly used elastomers:

Natural Rubbers

• Polyisoprene (NR)

- used for vehicle tyres, tubes, seals, antivibration mountings, hoses, belts

- shore hardness: 30 - 90

- temperature range: -55^oC - 85^oC

Syntetic Rubbers

• Styrene butadiene rubbers (SBR, GRS, BUNA S)

- used for vehicle tyres, tubes, seals, antivibration mountings, hoses, belts

- shore hardness: 40 - 80

- temperature range: -50^oC - 82^oC

• Butadiene rubbers, polybutadiene (BR)

- used for same applications as natural rubber

- shore hardness: 40 - 90

- temperature range: -100^oC - 90^oC

• Butyl rubbers, isobutylene isoprene (GR 1)

- extremely resistant to grease, silcone fluids, water

- used for puncture-proof tyres, tubes and vacuum seals

- shore hardness: 40 - 90

- temperature range: -45^oC - 150^oC

• Nitrile rubbers, butadiene acroylonitrile (BUNA)

- good resistance to fuels, oils, solvents, water, silicon fluids

- used for o-rings, seals, petrol hoses, fuel pumps

- shore hardness: 40 - 95

- temperature range: -55^oC - 82^oC

• Neoprene rubbers, polychlorprene, chloroprene 

- resistant to weather aging

- used for diving suits

- shore hardness: 30 - 50

- temperature range: -40^oC - 115^oC

• Polyurethane rubbers

- exceptional strength and tear

- used for wear resistant applications

- shore hardness: 35 - 100

- temperature range: -50^oC - 115^oC

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Related Topics

• Material Properties - Material properties - density, heat capacity, viscosity and more - for gases, fluids and solids

Related Documents

• Chemical Resistance of Rubbers and Elastomers - Common rubbers and elastomers - resistance to chemicals - solvents and softeners - swelling properties
• Gasket Characteristics - Gaskets are used to make a fluid or gas resistant seal between two surfaces