TODAY IS ANNIVERSARY OF Stephanie Kwolek Born 31 Jul 1923; died 18 Jun 2014 at age 90. American chemist and inventor of Kevlar. Shortly after graduating with a bachelors degree in chemistry (1946), she began a career at DuPonts textile fibers department in Buffalo, New York. Kwolek was assigned to search for a new, high-performance fiber that would be acid- and base-resistant and stable at high temperatures, suitable to replace steel in radial tyres. After extensive experimentation, she created a polymer solution which, when spun into a fibre, was five times stronger than steel and had half the density of fiberglass. It was named Kevlar. Today, this fibre is used to make bullet-proof jackets military helmets, aircraft parts, inflatable boats, gloves, rope, and building materials. Kwolek never pursued a Ph.D. degree. She was the fourth woman inducted into the National Inventors Hall of Fame (1995). sergiorbtorres.blogspot.br/2014/07/innovative-lives-stephanie-kwolek-and.html # sergiorbtorres Sincerely, Prof. Sergio Torres Join Group Physics is too - only 289.00 monthly real you are entitled to all the handouts of thousands of unresolved issues and CLASSES 24 HOURS A DAY 7 DAYS A WEEK THROUGH SKYPE, everything directly with the teacher. SKYPE Download the app and add your teacher on (fisicaseculo21) arrange a time to take private lessons and get your questions answered - not accrue questions and not leave it to the last minute - visit the channel and get access directly with your teacher. The first step is to open the physics group and from this obtain all relevant information: https://facebook/groups/cursodefisica/
Posted on: Thu, 31 Jul 2014 15:07:21 +0000
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