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What is the role of t-butyl peroxide in ...

What is the role of t-butyl peroxide in the polymerisation of ethene

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t-butyl peroxide acts as a radical initiator in the polymerization of ethane. The t-butoxide radical formed as a result of thermal decomposition of t-butyl peroxide adds to ethene molecule to form growing radical

The growing radical chain (I) combines with more and ethene molecules to form bigger and bigger radical chains which ultimately get terminate either by combination or disproportiontion to yield polythene polyer.
Thus , the role of t-butyl peroxide is to start the process of polymerization.
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