Classify the following polymers as chain growth and step growth polymers :
(i) Buna - S (ii) Nylon - 6, 6 (iii) Terylene (iv) PVC.

Explanation

To classify the given polymers as chain growth or step growth, we need to understand the characteristics of each type of polymerization:

1. **Chain Growth Polymerization**: This involves the addition of monomers with unsaturated bonds (like alkenes) to form long chains. No small molecules are released during this process.

2. **Step Growth Polymerization**: This involves the reaction of monomers with two or more functional groups, leading to the formation of polymers through a series of condensation reactions, often releasing small molecules like water or alcohol.

Now, let's classify the given polymers:

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