Which term refers to a plastic that, once formed into a shape, cannot be reformed?

Which term refers to a plastic that, once formed into a shape, cannot be reformed?

• A. Thermoplastic
• B. Volume
• C. Thermosetting plastic
• D. Twisting

Answer: (C)

Thermosetting plastics form a rigid, cross-linked network during curing, and once this network is set, the material does not melt or flow. That means it cannot be reformed into a new shape, even with heat, which is why this term fits best. In contrast, thermoplastics soften when heated and can be reshaped, so they’re reformable. The other terms aren’t types of plastics, so they don’t describe a material that becomes permanently fixed in shape.

Thermosetting plastics form a rigid, cross-linked network during curing, and once this network is set, the material does not melt or flow. That means it cannot be reformed into a new shape, even with heat, which is why this term fits best. In contrast, thermoplastics soften when heated and can be reshaped, so they’re reformable. The other terms aren’t types of plastics, so they don’t describe a material that becomes permanently fixed in shape.