The polymer containing strong intermolecular forces, e.g., hydrogen bonding is:

Options

A. teflon
B. nylon 6,6
C. polystyrene
D. natural rubber

Answer

To solve the question regarding which polymer contains strong intermolecular forces, specifically hydrogen bonding, we can analyze the given options one by one.

### Step-by-Step Solution:

1. **Identify the Polymers**: We have four polymers to analyze: Teflon (PTFE), Nylon 6-6, Polystyrene, and Natural Rubber.

2. **Analyze Teflon (PTFE)**:
- Teflon is composed of repeating units of tetrafluoroethylene (CF2=CF2).
- The structure does not contain any hydrogen atoms that are directly bonded to electronegative atoms (like nitrogen or oxygen) capable of forming hydrogen bonds.
- **Conclusion**: Teflon does not exhibit hydrogen bonding.

3. **Analyze Nylon 6-6**:
- Nylon 6-6 is formed from hexamethylene diamine and adipic acid, leading to the formation of amide linkages.
- The structure includes nitrogen (N) atoms bonded to hydrogen (H) atoms, which can participate in hydrogen bonding with other nylon chains.
- **Conclusion**: Nylon 6-6 can form hydrogen bonds due to the presence of NH groups.

4. **Analyze Polystyrene**:
- Polystyrene is made from the polymerization of styrene (C6H5CH=CH2).
- The structure consists of carbon and hydrogen atoms only, with no electronegative atoms present to facilitate hydrogen bonding.
- **Conclusion**: Polystyrene does not exhibit hydrogen bonding.

5. **Analyze Natural Rubber**:
- Natural rubber is primarily composed of isoprene units (C5H8).
- Similar to polystyrene, it consists of carbon and hydrogen atoms, lacking any electronegative atoms that could participate in hydrogen bonding.
- **Conclusion**: Natural rubber does not exhibit hydrogen bonding.

6. **Final Conclusion**:
- After analyzing all four polymers, we find that only Nylon 6-6 exhibits strong intermolecular forces due to hydrogen bonding. Therefore, the answer is **Nylon 6-6**.

### Summary of the Answer:
The polymer containing strong intermolecular forces, specifically hydrogen bonding, is **Nylon 6-6**.