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Polymers
Question
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Why is cationic polymerization preferred in case of vinylic monomers containing electron donating groups?

Answer

Cationic Addition Polymerization : In the case of vinylic monomers containing electron donating groups, electron density on double bonded carbon will be more and it can easily be attacked by H+ so as to undergo cationic polymerization. Cations are stabilised by electron donating groups.

It involves following steps:
(i) Chain initiation step:

(ii) Chain propagation step:

(iii) Chain terminating step:

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Some More Questions From Polymers Chapter

Explain the difference between Buna-N and Buna-S.

Arrange the following polymers in increasing order of their intermolecular forces.
Nylon 6, 6, Buna-S, Polythene.

Arrange the following polymers in increasing order of their intermolecular forces.
Nylon-6, Neoprene, Polyvinyl chloride.

Explain the terms polymer and monomer.

How do you explain the functionality of a monomer?

Define the term polymerization.

Is (NH—CHR—CO)n, a homopolymer or copolymer?

What is the basic unit of polymer called?

What is an addition polymer?