How many of these polymers are condensation polymers?
Nylonn - 6, 6, Dacron, Bakelite, Teflon, Buna - N, Nylon - 6, Glyptal, Polythene

Answer

To determine how many of the listed polymers are condensation polymers, we need to analyze each polymer based on its formation process. Condensation polymers are formed when two or more monomers join together with the elimination of a small molecule, such as water or methanol.

Let's evaluate each polymer:

1. **Nylon 6,6**:
- Formed from hexamethylenediamine and adipic acid.
- During the polymerization, water is eliminated.
- **Conclusion**: Condensation polymer.

2. **Dacron (Polyethylene terephthalate)**:
- Made from ethylene glycol and terephthalic acid.
- Water is eliminated during the formation.
- **Conclusion**: Condensation polymer.

3. **Bakelite**:
- Formed from phenol and formaldehyde.
- Water is eliminated during the reaction.
- **Conclusion**: Condensation polymer.

4. **Teflon (Polytetrafluoroethylene)**:
- Made from the polymerization of tetrafluoroethylene.
- This is an addition polymerization; no small molecule is eliminated.
- **Conclusion**: Not a condensation polymer.

5. **Buna-N**:
- Formed from the copolymerization of acrylonitrile and butadiene.
- This is an addition polymerization; no small molecule is eliminated.
- **Conclusion**: Not a condensation polymer.

6. **Nylon 6**:
- Formed from the polymerization of caprolactam.
- Water is eliminated during the formation.
- **Conclusion**: Condensation polymer.

7. **Glyptal**:
- Made from ethylene glycol and phthalic acid.
- Water is eliminated during the reaction.
- **Conclusion**: Condensation polymer.

8. **Polythene (Polyethylene)**:
- Formed from the polymerization of ethylene.
- This is an addition polymerization; no small molecule is eliminated.
- **Conclusion**: Not a condensation polymer.

Now, let's summarize the results:

- **Condensation Polymers**: Nylon 6,6, Dacron, Bakelite, Nylon 6, Glyptal.
- **Not Condensation Polymers**: Teflon, Buna-N, Polythene.

**Total condensation polymers**: 5