Which of the following is not correct regarding terylene?

Options

A. Condensation polymer
B. Synthetic fibre
C. Step growth polymer
D. Thermosetting plastic

Answer

To determine which statement regarding Terylene is not correct, we will analyze the properties and characteristics of Terylene based on the information provided.

### Step-by-Step Solution:

1. **Identify Terylene**:
- Terylene, also known as Dacron, is a synthetic polymer made from the monomers ethylene glycol and terephthalic acid.

2. **Understand the Polymerization Process**:
- Terylene is formed through a condensation polymerization process, where ethylene glycol and terephthalic acid react to form the polymer while eliminating water molecules.

3. **Check the Characteristics of Terylene**:
- **Condensation Polymer**: Terylene is indeed a condensation polymer because it is formed by the elimination of water during the polymerization process.
- **Synthetic Fiber**: Terylene is a synthetic fiber, as it is manufactured through chemical processes.
- **Step Growth Polymer**: Terylene is classified as a step-growth polymer because the polymerization occurs in a stepwise manner, combining monomer units to form larger molecules.
- **Thermosetting Plastic**: This statement is incorrect. Terylene is not a thermosetting plastic; it is a thermoplastic polyester. Thermosetting plastics cannot be remolded once set, while thermoplastics can be melted and reshaped.

4. **Conclusion**:
- The statement that Terylene is a thermosetting plastic is not correct.

### Final Answer:
The statement that is not correct regarding Terylene is that it is a thermosetting plastic.