1. SYNTHETIC
RUBBER

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

3. 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.

4. STYRENE - BUTADIENE
RUBBER

5. 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.

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

9. DISADVANTAGES

10. • Can be attacked easily by even traces of ozone if present in
air.
• Can be spoiled by oils and solvents , due to swelling.

12. • 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.

14. NATURAL RUBBER VULCANISED RUBBER SYNTHETIC RUBBER
Low tensile strenght – Higher tensile strength- Much higher tensile strength-
20kg/cm2 200kg/cm2 250kg/cm2
Temperatur range – Temperatur range – Highly resistant to heat
10o c to 60 o c 40o c to 150 o c
High tackiness Low tackiness No tackiness
Poor abrasion High abrasion resistance Much more higher abrasion
resistence
Soft & Weak Stronger Strongest