Mechanical Engineering - Engineering Materials - Discussion

The correct answer is: thermoplastic.

Polyvinylchloride (PVC) is a thermoplastic material, meaning it can be:

1. Melted and reformed multiple times without undergoing any significant chemical change
2. Softened by heat and hardened by cooling
3. Processed using various techniques, such as extrusion, injection moulding, and calendaring

Thermoplastics, like PVC, can be recycled and reused, making them a popular choice for various applications, including:
1. Pipes and fittings
2. Vinyl records
3. Credit cards
4. Packaging materials.
5. Window frames.

In contrast, thermosetting materials:
1. Undergo a chemical change when heated, resulting in a permanent shape.
2. Cannot be melted and reformed.
3. Are often used in applications where high heat resistance and dimensional stability are required, such as:
a. Electrical insulators
b. Adhesives
c. Composites

Note that PVC can be formulated to have varying degrees of flexibility, rigidity, and impact resistance, making it a versatile material for different applications.

PVC is the thermoplastic material.

PVC is thermoplastic.

PVC is thermosoftening material because it is used for a recyclable without changing material structure.

Polyester is thermosetting material.