![]() It is a crucial component in personal armor, including combat helmets, ballistic face masks, and vests. In science, it is employed for suspension purposes in cryogenics and as a thermal standoff. Kevlar is widely used in various applications due to its strength, low thermal conductivity, and high-performance characteristics. ![]() Its thermal properties allow it to maintain strength and resilience in extreme temperatures, although prolonged exposure to high temperatures can reduce its strength. However, Kevlar is vulnerable to UV degradation and is not commonly used outdoors without protection. The fiber has a high tensile strength and a molecular structure that includes inter-chain bonds and aromatic stacking interactions. Kevlar is available in various grades for diverse applications, including industrial use, cables, ropes, and ballistic protection. It is synthesized from monomers 1,4-phenylene-diamine and terephthaloyl chloride through a condensation reaction. Kevlar, a lightweight and strong fiber, was invented by chemist Stephanie Kwolek at DuPont in anticipation of a gasoline shortage. It is also used to make modern marching drumheads that withstand high impact and for mooring lines and other underwater applications. Kevlar has many applications, ranging from bicycle tires and racing sails to bulletproof vests, all due to its high tensile strength-to-weight ratio by this measure it is five times stronger than steel. ![]() It is typically spun into ropes or fabric sheets that can be used as such, or as an ingredient in composite material components. Developed by Stephanie Kwolek at DuPont in 1965, the high-strength material was first used commercially in the early 1970s as a replacement for steel in racing tires. Kevlar (para-aramid) is a strong, heat-resistant synthetic fiber, related to other aramids such as Nomex and Technora. ![]()
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