Which of the following are condendation homopolymers ?

Options

A. Nylon-6
B. Nylon-6,6
C. dacron
D. Glyptal

Explanation

To determine which of the given options are condensation homopolymers, we need to understand the definitions of condensation polymers and homopolymers:

1. **Homopolymer**: A polymer made from only one type of monomeric unit.
2. **Condensation Polymer**: A polymer formed through a condensation reaction, where small molecules (like water) are released during the polymerization process.

### Step-by-Step Solution:

1. **Identify the Monomer**:
- Look at the given options and identify the monomeric units used to form each polymer.

2. **Check for Homopolymer**:
- Ensure that the polymer is made from only one type of monomeric unit. If it consists of two different types of monomers, it cannot be classified as a homopolymer.

3. **Check for Condensation Reaction**:
- Determine if the polymerization process involves the elimination of small molecules (like water). If it does, then it is a condensation polymer.

4. **Analyze Specific Examples**:
- **Nylon 6**: Made from caprolactam (a single type of monomer). The reaction releases water, so it is a condensation homopolymer.
- **Nylon 6,6**: Made from hexamethylene diamine and adipic acid (two different monomers). Therefore, it is not a homopolymer.
- **Dacron**: Made from terephthalic acid and ethylene glycol (two different monomers). Thus, it is not a homopolymer.
- **Gliptal**: Also made from two different monomers (ethylene glycol and terephthalic acid), so it is not a homopolymer.

5. **Conclusion**:
- The only polymer that fits both criteria (condensation and homopolymer) is **Nylon 6**.

### Final Answer:
- **Nylon 6** is the only condensation homopolymer among the options provided.