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Stephanie Louise Kwolek (/ ˈ k w oʊ l ɛ k /; July 31, 1923 – June 18, 2014) was a Polish-American chemist best known for inventing Kevlar (poly-paraphenylene terephthalamide). Her career at the DuPont company spanned more than 40 years.
Kevlar (para-aramid) [2] is a strong, heat-resistant synthetic fiber, related to other aramids such as Nomex and Technora.Developed by Stephanie Kwolek at DuPont in 1965, [3] [2] [4] the high-strength material was first used commercially in the early 1970s as a replacement for steel in racing tires.
In 1971, research chemist Stephanie Kwolek discovered a liquid crystalline polymer solution. Its exceptional strength and stiffness led to the invention of Kevlar , a synthetic fibre, woven into a fabric and layered, that, by weight, has five times the tensile strength of steel. [ 26 ]
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Stephanie Kwolek, American chemist of Polish origin, who in 1965 created the first of a family of synthetic fibers of exceptional strength and stiffness. The best-known member is Kevlar , a material used in protective vests as well as in boats, airplanes, ropes, cables, and much more—in total about 200 applications.
Sitting with your legs nicely crossed is one thing, but this woman somehow managed to twist her legs around each other nearly three times! View post on imgur.com.
Kevlar A powerful para-aramid synthetic fiber, developed by Stephanie Kwolek at DuPont in 1965 Polonium and radium The discoveries of elements radium and polonium were made by Polish chemist Marie Curie through the deep study of their nature and their compounds. Rhenium