Which type of plastic is FRP?

• A. Thermoset
• B. Thermoplastic
• C. Elastomer
• D. Bioplastic

Answer: (A)

Fiber-reinforced polymer composites rely on a resin matrix to bind the reinforcing fibers and transfer loads between them. In most FRPs, the resin is a thermosetting material. Once it cures, it forms a crosslinked network that cannot be melted or re-shaped by heat. This gives the matrix excellent thermal and chemical resistance, dimensional stability, and strong bonding to the fibers, which is essential for maintaining stiffness and strength in the finished part.

Thermosets are preferred over thermoplastics in many FRP applications because they maintain their shape and properties under heat and load, whereas thermoplastics soften or creep more easily and can be less stable in demanding environments. Elastomers are too flexible for rigid structural parts, and bioplastics don’t typically offer the same durability and resistance characteristics required for traditional FRP matrices.