What term describes materials like acrylic, polycarbonate, and Teflon?

The term that describes materials such as acrylic, polycarbonate, and Teflon is thermoplastics. Thermoplastics are a category of polymers that can be melted and re-molded multiple times without significant chemical change, making them very versatile for various applications in engineering and manufacturing. They are characterized by their ability to become soft and pliable upon heating, which allows for easy shaping during processes such as injection molding or extrusion.

Acrylic, for example, is known for its transparency and weather resistance, making it an excellent substitute for glass in many applications. Polycarbonate is known for its impact resistance and is often used in applications that require high durability. Teflon, renowned for its non-stick properties and chemical resistance, is commonly used in applications where low friction is desired, such as cookware and industrial machinery.

The other terms refer to different types of materials or material properties. Elastomers are rubber-like materials with elastic properties; composites are materials made from two or more constituent materials that provide enhanced properties; and metals are generally solid materials with metallic characteristics such as conductivity and malleability. Each of these options represents distinct categories, making thermoplastics the most fitting selection for the materials in question.