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Stephanie Kwolek dies at 90; DuPont researcher helped develop Kevlar
Stephanie Kwolek dies at 90; DuPont researcher helped develop Kevlar

Stephanie Kwolek, the DuPont Co. scientist whose research on polymers in the 1960s led to the creation of Kevlar, the light, super-strong synthetic fabric used in bulletproof vests and body armor credited with saving thousands of lives, has died. She was 90. Kwolek died Wednesday under hospice care at St. Francis Hospital in Wilmington, Del., according to a DuPont spokesman. The cause was not given. During an achievement-laden career as a chemist at DuPont, Kwolek made her greatest mark with her 1965 work on a liquid crystal polymer that, dissolved in solvent and pressed through a device resembling a very fine colander, became a fiber five times stronger than steel, ounce for ounce. ...

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