Final answer:
Nylon, particularly Nylon 6 and Nylon 66, is a man-made fiber famous for its exceptional elasticity, able to stretch and return to its original shape. It was originally developed to replace silk in products such as parachutes and has since become widespread in various applications, including clothing and tire cords.
Step-by-step explanation:
The man-made fiber known for its extreme elastic properties is nylon, specifically the types referred to as Nylon 6 and Nylon 66. These fibers are formed through a polymerization process that results in long chains capable of stretching and returning to their original shape, which is a key attribute of elasticity. Initially developed as a replacement for silk, especially during World War II, nylon has become a staple in various industries due to its strength, elasticity, and resistance to abrasion and chemicals. Its uses have expanded to include tire cords, apparel, ropes, and many more applications.
Besides nylon, other polymers like polyester and acrylic have also been utilized for their particular properties such as strength, warmth, and resistance to stains. However, when it comes to elasticity, nylon stands out due to its ability to withstand significant stretching forces and recover without losing its original form, making it invaluable in applications where durability and flexibility are paramount.