Which of these is a thermoplastic material?

Options

A. Styrene
B. Bakelite
C. Melamine
D. Polyvinyl chloride

Explanation

**Step-by-Step Solution:**

1. **Understanding Thermoplastics**:
- Thermoplastics are materials that become soft when heated and harden upon cooling. This property allows them to be molded into various shapes.

2. **Identifying the Options**:
- In the question, we need to identify which of the given options is a thermoplastic material. Common examples of thermoplastics include polyvinyl chloride (PVC), polystyrene, and polyethylene.

3. **Analyzing Polyvinyl Chloride (PVC)**:
- Among the options, polyvinyl chloride (PVC) is a well-known thermoplastic. It is made from the polymerization of vinyl chloride (CH2=CHCl).

4. **Structure of PVC**:
- The structure of PVC can be represented as a linear polymer made up of repeating units of vinyl chloride. This linear structure contributes to its thermoplastic properties.

5. **Conclusion**:
- Based on the properties of thermoplastics and the analysis of the options, the correct answer is polyvinyl chloride (PVC).

**Final Answer**: Polyvinyl chloride (PVC) is a thermoplastic material.

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