Vulcanization is a chemical process in which the rubber is heated with sulphur, accelerator and activator at 140–160°C. The process involves the formation of cross-links between long rubber molecules so as to achieve improved elasticity, resilience, tensile strength, viscosity, hardness and weather resistance.

What is vulcanisation of rubber and why is it done?

vulcanization, chemical process by which the physical properties of natural or synthetic rubber are improved; finished rubber has higher tensile strength and resistance to swelling and abrasion, and is elastic over a greater range of temperatures.

How do you Vulcanize?

The first process, called Pressure Vulcanization involves heating the rubber with sulfur under pressure, with a temperature of 150C. The second process, called Free Vulcanization, simply involves passing very hot steam or air through the rubber.