Question

9. Among the following, strength/weight ratio is highest for
(a) Steel
(b Nylon
(C) Kevlar
(d) Polyester​

Answer 1

Answer:

Synthetic fiber

Synthetic fibers such as glass fibers, carbon fibers, and boron fiber are gaining more attention over last two decades. Natural fiber composites are having healthy competition with synthetic composites such as glass–polypropylene and glass–epoxies. Synthetic fiber-reinforced polymer composites provide high-strength and stiffness materials that are widely accepted as aerospace components and automotive industries [39]. Nowadays, natural fibers are used to replace synthetic fibers because of environmental concern as a reinforced material in polymer composites for engineering materials [40]. Hybrid composites of natural and synthetic fibers are often used to enhance the mechanical strength of polymer composites