Stephanie Kwolek

Stephanie Louise Kwolek was born on July 31, 1923, in New Kensington, Pennsylvania, to Polish immigrant parents. She earned a degree in chemistry from Carnegie Institute of Technology (now Carnegie Mellon University) in 1946. In 1950, Kwolek joined the DuPont Company's research laboratory in Wilmington, Delaware, where she would spend her entire 40-year career. In 1965, while researching lightweight materials for automobile tires, she discovered an extraordinary liquid crystalline polymer solution that, when spun into fibers, produced a material five times stronger than steel at equal weight. This material became known as Kevlar, trademarked in 1971. Kwolek's invention revolutionized numerous industries, becoming essential in protective equipment such as bulletproof vests, motorcycle helmets, and military body armor, saving countless lives. Beyond Kevlar, she authored or co-authored 17 patents throughout her career. She received numerous accolades, including being named one of the 20 greatest female scientists by the Women's Museum in 2002 and receiving the National Medal of Technology. Kwolek's legacy extends beyond her scientific achievements—she broke barriers as a woman in the male-dominated field of chemistry and inspired generations of female scientists and engineers.