In the given polymers which is a condensation polymer.

Options

A. Teflon
B. Neoprene
C. Buna-S
D. Nylon-6,6

Answer

To determine which of the given polymers is a condensation polymer, we will analyze the structure and formation of nylon 6-6, a well-known example of a condensation polymer.

### Step-by-Step Solution:

1. **Identify the Monomers**:
- The monomers for nylon 6-6 are adipic acid and hexamethylenediamine.
- **Adipic Acid**: It has the formula HOOC-(CH2)4-COOH, which consists of 6 carbon atoms.
- **Hexamethylenediamine**: It has the formula H2N-(CH2)6-NH2, which also consists of 6 carbon atoms.

2. **Draw the Structures**:
- **Adipic Acid**:
- Structure:
```
HOOC-CH2-CH2-CH2-CH2-COOH
```
- **Hexamethylenediamine**:
- Structure:
```
H2N-CH2-CH2-CH2-CH2-CH2-CH2-NH2
```

3. **Polymerization Reaction**:
- When nylon 6-6 is formed, the carboxylic acid group (–COOH) from adipic acid reacts with the amine group (–NH2) from hexamethylenediamine.
- During this reaction, a water molecule (H2O) is released. This is characteristic of condensation polymerization.

4. **Formation of Nylon 6-6**:
- The reaction can be summarized as:
```
HOOC-(CH2)4-COOH + H2N-(CH2)6-NH2 → Nylon 6-6 + H2O
```
- The resulting polymer has alternating amide (–CONH–) linkages.

5. **Conclusion**:
- Since the formation of nylon 6-6 involves the release of water, it is classified as a condensation polymer.
- Other types of polymers, such as addition polymers, do not involve the release of small molecules during their formation.

### Final Answer:
The condensation polymer among the given options is **Nylon 6-6**.

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