SYNTHETIC RUBBER

Synthetic Rubber

Styrene-Butadiene rubber (SBR)Government rubber styrene (GR-S)Buna-S

What is “Synthetic Rubber”?

A synthetic rubber is a material which can :Undergo much more elastic deformation

under stress than most materials.

Return to its previous size without permanent deformation.

STYRENE - BUTADIENE RUBBER

Styrene - Butadiene Rubber :

o Styrene-butadiene or styrene-butadiene rubber (SBR) describe families of styrene rubber derived from styrene and butadiene.

o Styrene – butadiene rubber (SBR) is made by using

75% butadiene and 25% styrene by weight . It is a block co-polymer.

PROPERTIES

PROPERTIES• Tensile strength of SBR can be increased to 250 kg/cm2 •High resistance to heat & ageing.•High abrasion resistance.•High load bearing capacity

DISADVANTAGES

DISADVANTAGES:

• Can be attacked easily by even traces of ozone if present in air.

• Can be spoiled by oils and solvents , due to swelling.

USES

Uses : • SBR is the most widely used rubber.

•It is used in making tyre of vehicles/motors.

•Other uses are , floor tiles , shoe soles , gaskets , footware components , wire and cable insulation , carpet backing, conveyer belts , etc.

NATURAL RUBBERV/S

SYNTHETIC RUBBER

NATURAL RUBBERV/SSYNTHETIC RUBBER

NATURAL RUBBER

VULCANISED RUBBER

SYNTHETIC RUBBER

Low tensile strenght – 20kg/cm2

Higher tensile strength-

200kg/cm2

Much higher tensile strength-

250kg/cm2

Temperatur range – 10o c to 60 o c

Temperatur range – 40o c to 150 o c

Highly resistant to heat

High tackiness Low tackiness No tackiness

Poor abrasion High abrasion resistance

Much more higher abrasion resistence

Soft & Weak Stronger Strongest

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