What is Compounding of rubber?
Heating raw rubber at100-140oC with sulphur for improving strength, temp range, elasticity anti oxidation etc. is known as compounding of rubber or vulcanization. The added sulphur combines chemically at the double bonds of different rubber springs and provides cross-linking between the chains. This cross-linking brings about a stiffening of the rubber by anchoring and thereby preventing intermolecular movement of rubber springs.