What Did Stephanie Louise Kwolek Invent?

What Did Stephanie Louise Kwolek Invent? Stephanie Kwolek, in full Stephanie Louise Kwolek, (born July 31, 1923, New Kensington, Pennsylvania, U.S.—died June 18, 2014, Wilmington, Delaware), American chemist, a pioneer in polymer research whose work yielded Kevlar, an ultrastrong and ultrathick material best known for its use in bulletproof vests. How did Stephanie Kwolek invent