Which is a thermosetting polymer?

Which is a thermosetting polymer?

• A. Elastomer (deformable at room temp)
• B. Thermosetting plastic
• C. Composite
• D. Thermoplastic

Answer: (B)

A thermosetting polymer cures to form a rigid, cross‑linked network that cannot be melted or reshaped after curing. This permanent set gives high heat resistance and dimensional stability. Among the options, the thermosetting plastic fits this behavior because it is designed to cure irreversibly into a solid network. An elastomer is defined by its elasticity, not curing behavior; a composite is a material made from a combination of constituents; and a thermoplastic melts and can be remolded, which is the opposite of a thermosetting polymer.

A thermosetting polymer cures to form a rigid, cross‑linked network that cannot be melted or reshaped after curing. This permanent set gives high heat resistance and dimensional stability. Among the options, the thermosetting plastic fits this behavior because it is designed to cure irreversibly into a solid network. An elastomer is defined by its elasticity, not curing behavior; a composite is a material made from a combination of constituents; and a thermoplastic melts and can be remolded, which is the opposite of a thermosetting polymer.