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Explain free radical polymerisation with example. |
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Answer» Solution :(i) When alkenes are heated with free radical initiator such as benzoyl peroxide, they undergo polymerisation reaction. For example, styrene polymerises to polystrene when it is heated with a peroxide initator. The mechanism involves the following steps. (ii) INITIATION - Formation of free radical:  The stabilised radical attacks another monomer molecule to GIVE an ELONGATED radical  (iv) Chain growth will CONTINUE with the successive addition of several THOUSANDS of monomer units. (v) Termination: The above chain reaction can be stopped by stopping the supply of monomer or by coupling of two chains or reaction with an impurity such as oxygen. 
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