Stephanie Kwolek, American chemist who
invented Kevlar, dies at 90
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[June 21, 2014]
By Will Dunham
WASHINGTON (Reuters) - Stephanie Kwolek,
an American chemist who in 1965 invented a super-strong fiber called
Kevlar that revolutionized body armor and protected innumerable police
officers and soldiers from bullets, has died at age 90.
Kwolek, who worked for the DuPont chemical company for four
decades starting in 1946, died in Delaware after a short illness.
The company confirmed her death.
"We are all saddened at the passing of DuPont scientist Stephanie
Kwolek, a creative and determined chemist and a true pioneer for
women in science," DuPont Chief Executive Ellen Kullman said in a
statement. "Her synthesis of the first liquid crystal polymer and
the invention of DuPont Kevlar highlighted a distinguished career."
The 4-foot-11 Kwolek was working to find a fiber to strengthen
radial tires when she came across a thin, milky solution of polymers
that showed real promise.
She told the News Journal newspaper in Wilmington, Delaware, in 2007
that it was not exactly a "eureka moment." But it led to the
development of Kevlar, now a critical part of bulletproof vests,
helmets and other body armor components as well as a range of other
applications like tires, firefighter suits, boat hulls, fiber optic
cables, fuel hoses, airplane and spacecraft parts and skis.
Kevlar is lightweight but extremely strong - five times tougher than
"At least, I'm hoping I'm saving lives," Kwolek told the newspaper.
"There are very few people in their careers that have the
opportunity to do something to benefit mankind."
She was careful to take credit for only the initial discovery of the
technology that led to the development of Kevlar and credited the
work of others involved in the efforts.
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In the 2007 comments, she said she was afraid to tell her managers
and conducted repeated tests just to make sure.
"I didn't want to be embarrassed. When I did tell management, they
didn't fool around. They immediately assigned a whole group to work
on different aspects," she said.
Kwolek was born on July 31, 1923, in New Kensington, Pennsylvania,
graduated from Carnegie Institution of Technology with a chemistry
degree and was hired by Dupont a year after the end of World War
(Reporting by Will Dunham; Editing by Bill Trott)
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