Chemical Process
Vulcanisation of rubber

Increases its oil & solvent resistance
Converts its plasticity into elasticity
Increases its ozone & oxygen reactivity
Decreases its tensile strength

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Chemical Process
Reverse osmosis is normally used for the

Desalination of brackish water to produce potable (drinking) water
Separation of helium from natural gas
Purification of oxygen
Separation of isotopes of uranium from gaseous uranium hexaflouride

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