Which of the following are Thermoplastic polymers?

Options

A. PVC
B. Teflon
C. Bakelite
D. Nylon

Answer

To determine which of the following are thermoplastic polymers, we need to understand the characteristics of thermoplastics and differentiate them from thermosetting plastics.

### Step-by-Step Solution:

1. **Understand Thermoplastic Polymers**:
- Thermoplastic polymers are materials that can be melted and reformed multiple times without undergoing any significant chemical change. They are characterized by weaker intermolecular forces compared to thermosetting polymers.
- Common examples of thermoplastics include polyethylene (polythene), polystyrene, polyvinyl chloride (PVC), and Teflon.

2. **Identify the Given Options**:
- The options provided are:
- A. PVC (Polyvinyl Chloride)
- B. Teflon (Polytetrafluoroethylene)
- C. Backlight (Bakelite)
- D. Nylon

3. **Classify Each Option**:
- **PVC**: This is a thermoplastic polymer. It can be melted and reshaped.
- **Teflon**: This is also a thermoplastic polymer known for its non-stick properties.
- **Backlight (Bakelite)**: This is a thermosetting plastic. Once it is set, it cannot be remolded.
- **Nylon**: While commonly used as a fiber, it is also classified as a thermoplastic. However, it is sometimes categorized separately due to its specific applications.

4. **Conclusion**:
- From the analysis, the thermoplastic polymers among the options are:
- A. PVC
- B. Teflon
- D. Nylon
- Therefore, the correct answer is A, B, and D.

### Final Answer:
The thermoplastic polymers from the given options are **A (PVC), B (Teflon), and D (Nylon)**.