Structural polymers are materials made from long chains of molecules that provide strength and support in various applications. They are commonly used in construction, automotive, and aerospace industries due to their lightweight and durable nature. Examples of structural polymers include polyethylene, polypropylene, and polycarbonate. These polymers can be engineered to have specific properties, such as resistance to heat, chemicals, and impact. Their versatility allows them to replace traditional materials like metal and wood in many products, leading to innovations in design and functionality. Structural polymers play a crucial role in modern manufacturing and engineering.