Stephanie Kwolek was born on July 31, 1923, in New Kensington, Pennsylvania. Her father, who died when she was ten years old, loved nature and often took her on walks to explore plants and animals. Her mother was skilled at sewing, and young Stephanie thought about becoming a fashion designer. She was a curious and hardworking student who loved science from an early age. Her family’s Polish heritage gave her a strong sense of determination and pride.
Kwolek studied chemistry at the Carnegie Institute of Technology, now called Carnegie Mellon University, and graduated in 1946. She planned to save money for medical school, but she took a temporary job at DuPont, a major chemical company. She quickly fell in love with chemistry research and decided to stay at DuPont instead of pursuing medicine. Over the next several decades, she became an expert in creating new kinds of synthetic fibers. She was one of very few women working as a research chemist at that time.
In 1965, Kwolek made a surprising discovery while trying to create a lightweight but strong fiber for car tires. She produced a strange, cloudy liquid polymer that looked very different from the clear solutions she usually made. Her colleagues thought the liquid was a failure and wanted to throw it away, but Kwolek insisted on testing it. When they spun the solution into fibers, they found it was five times stronger than steel by weight. This amazing material became known as Kevlar, one of the most important inventions of the twentieth century.
Kevlar has been used in hundreds of products that protect and help people around the world. Bulletproof vests made with Kevlar have saved the lives of thousands of police officers and soldiers. The material is also used in firefighter gear, helmets, airplane parts, and even spacecraft. Because Kevlar is so strong and lightweight, it works perfectly in racing sails, suspension bridge cables, and protective gloves. Kwolek once said she felt great satisfaction knowing her invention had saved so many lives.
Stephanie Kwolek received many honors for her groundbreaking work during her lifetime. In 1996, she was awarded the National Medal of Technology, one of the highest honors for an inventor in the United States. She was inducted into the National Inventors Hall of Fame in 1995, becoming only the fourth woman to receive that honor. Kwolek held 17 patents and published important scientific papers throughout her career. She passed away on June 18, 2014, but her invention continues to protect people every single day.
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