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Stephanie Louise Kwolek (/ ˈkwoʊlɛk /; 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. [1][2] For her discovery, Kwolek was awarded the DuPont company's Lavoisier Medal for outstanding technical ...
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.
Stephanie Kwolek, the inventor of Kevlar, graduated from Margaret Morrison Carnegie College in 1946 with a B.S. in General Science (Chemistry). [3] Newbery Medal winning-author E. L. Konigsburg is a 1952 graduate of Margaret Morrison Carnegie College. [7]
Stephanie Kwolek: 1923 2014 Kevlar [121] 1995 Waldo Semon: 1898 1999 Polyvinyl chloride [122] 1995 William Stanley Jr. 1858 1916 Induction coil [123] 1996 Leó Szilárd: 1898 1964 Neutronic atomic reactor [124] 1996 Arthur Leonard Schawlow: 1921 1999 Laser [125] 1996 Edmund Germer: 1901 1987 Fluorescent lighting [126] 1996 Federico Faggin: 1941 —
Lester D. Shubin (September 27, 1925 – November 20, 2009) was an American research chemist who developed Kevlar for the use in ballistic vests. Kevlar's use in ballistic vests was later expanded for use in all types of personal armor. Life. Shubin was born in Philadelphia, Pennsylvania, and graduated from South Philadelphia High School in 1943.
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. [25]
Net worth ($ million) 1 Kevin Hern: Republican Oklahoma House Yes 361.0* 2 Rick Scott: Republican: Florida: Senate: Yes 259.7 3 Mark Warner: Democratic: Virginia: Senate Yes 214.1 4 Greg Gianforte: Republican Montana: House: No 189.3 5 Paul Mitchell: Republican Michigan: House No 179.6 6 Mitt Romney: Republican Utah: Senate Yes 174.5 7 Vernon ...
September 12, 2024 at 12:32 PM. (Reuters) - U.S. household wealth rose last quarter to $163.8 trillion, a fresh record, driven by gains in real estate values as well as a rise in the stock market ...