Chemical Process
Vulcanisation of rubber

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

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Chemical Process
Reverse osmosis is normally used for the

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

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