Write the free radical mechanism for the polymerization of ethene.

Free redical mechanism involves three steps, such as ;
i) chain initiating step
ii) chain propagating step
iii)chain terminating step
In the polymerisation of ethene to polythene. Ethene is heating or exposing to light with benzoyl peroxide initiator. In this process a larger free radical is form.

As this radical reacts with another molecule of ethene, another bigger sized readical is formed. The repetition of this sequence is known as chain propagating step.

For the treminating of the long chain, these free radical can combine on different ways to form polythene.