Mention which of the following are addition polymers?
(i) terylene (ii) nylon-6,6
(iii) neoprene (iv) teflon.

Explanation

To determine which of the given compounds are addition polymers, we need to understand what an addition polymer is. An addition polymer is formed by the direct addition of monomer units that contain a double bond or a ring structure, leading to a polymer without the loss of any small molecules.

Let's analyze each of the compounds listed in the question:

1. **Terylene**:
- Terylene, also known as Dacron, is made from the polymerization of ethylene glycol and terephthalic acid. This process involves a condensation reaction, where water is eliminated during the formation of the polymer. Therefore, Terylene is **not** an addition polymer.

2. **Nylon-6,6**:
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