Termination due to improper addition of monomers

When the monomer is attached to the active centre in a manner leading to the formation of a weakly reactive ion, growth is terminated. A typical example of this kind of termination is the formation of an unreactive ion during cationic polymerization of vinyl carbazole. Instead of propagation 

The generated ion does not react with monomer. It easily combines with the counter-ion. 

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