Which of the following is not an example of addittion polymer ?

Options

A. Polythene
B. Polystyrene
C. Neoprene
D. Nylon 6,6

Explanation

To determine which of the following is not an example of an addition polymer, we first need to understand what addition polymers are.

### Step-by-Step Solution:

1. **Definition of Addition Polymers**:
Addition polymers are formed by the repeated addition of monomer units that contain double or triple bonds. During this process, no small molecules are eliminated.

2. **Examples of Addition Polymers**:
- **Polythene (Polyethylene)**: Formed from the monomer ethylene (C2H4). The polymerization involves the addition of ethylene units without any elimination.
- **Polystyrene**: Formed from the monomer styrene (C8H8). The polymerization occurs through the addition of styrene units, again without any elimination.
- **Neoprene**: Formed from the monomer chloroprene (C4H5Cl). This polymer is also formed by the addition of chloroprene units without elimination.

3. **Identifying Non-Addition Polymer**:
- **Nylon 6-6**: This is formed from the reaction between hexamethylenediamine and adipic acid. During this process, a molecule of water (H2O) is eliminated. This characteristic of elimination during polymer formation indicates that nylon 6-6 is not an addition polymer but rather a condensation polymer.

4. **Conclusion**:
Based on the definitions and examples discussed, the polymer that is not an addition polymer is **Nylon 6-6**.

### Final Answer:
The correct option is **D) Nylon 6-6**.