Final answer:
Kevlar is the material known for being used in protective clothing and equipment, especially due to its high tensile strength and the fact that it's about five times stronger than steel. It is widely used in body armor, helmets, and various gear for both military and civilian purposes. Nomex is another material used for its excellent heat resistance, particularly in racing suits.
Step-by-step explanation:
The strong synthetic material used in the construction of protective clothing and equipment that is also known for its application in body armor, combat helmets, and face masks is Kevlar. Kevlar was developed by chemist Susan Kwolek and is a polymer made up of 1,4-phenylene-diamine and terephthaloyl chloride, boasting a high tensile strength-to-weight ratio which is approximately five times stronger than steel when compared by weight. This extraordinary strength makes Kevlar an ideal choice for various applications, from protective gear for the military and emergency service personnel to sporting equipment like lightweight mountaineering ropes and bicycle tires.
In contrast, Nomex is another fire-resistant material used for protective clothing, particularly in racing suits for drivers and for military personnel who require protection from fire. Although Nomex and Kevlar are both aramid polymers, Nomex is less strong than Kevlar, but it has excellent thermal, chemical, and radiation resistance, making it suitable for different applications where heat resistance is crucial.