Stephanie Kwolek The nylon invented by Wallace Carothers is an excellent polymer with outstanding strength. But years after its invention, another DuPont chemist would take nylon much further. In the 1960s Stephanie Kwolek invented a new family of polyamide fibers, called aramids.

        Kevlar¨ is The most famous of the aramids. Fibers of Kevlar¨ are strong enough to be used to make fragmentation-resistant body armor. Puncture-proof tires are reinforced with Kevlar¨ cords, and high-strength Kevlar¨ composites are used to make everything from golf clubs to aircraft bodies.

        These composites often contain another aramid called Nomex¨. This material is incredibly flame resistant and is used to make fireproof clothing worn by fire-fighters, pilots, and race drivers. It is also used as a dielectric insulator, replacing mica.

        Nylon and the aramids created by Kwolek are part of a larger family of polymers, called step-growth polymers. All step-growth polymers, such as aramids, nylon, polyesters, polycarbonate and polyurethanes, are ultimately products of the work carried out by Carothers.

         


          Photo credt

          Stephanie Kwolek - Gift of Stephanie Kwolek.


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