Define a thermoplastic.

A thermoplastic is defined as a type of plastic that can be reheated and remolded numerous times without undergoing any significant chemical change. This property is due to the molecular structure of thermoplastics, which allows them to soften when heated and return to a solid state as they cool. This reversible process makes thermoplastics highly versatile and widely used in various applications, including packaging, automotive parts, and everyday consumer products.

The ability to reheat and remold thermoplastics is a significant advantage in manufacturing processes, as it facilitates recycling and reduces waste. Manufacturers can reshape thermoplastic materials multiple times, leading to greater efficiency and sustainability in production. This characteristic distinguishes thermoplastics from thermosetting plastics, which, once hardened, cannot be remolded or reheated.