Stephanie Kwolek’s invention: Kevlar By: Triple O (O.O.O) Stephanie, Jonathan, Lauren and Ezekiel.
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Transcript of Stephanie Kwolek’s invention: Kevlar By: Triple O (O.O.O) Stephanie, Jonathan, Lauren and Ezekiel.
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Stephanie Kwolek’s invention: Kevlar
By:Triple O (O.O.O)
Stephanie, Jonathan, Lauren and Ezekiel
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The Inventor
~Stephanie Louise Kwolek
~Polish-American chemist
~Born on July 31,1923.
~Grew up in New Kensington, Pennsylvania.
~Her father, John taught her to see and remember.
~Liked to collect leaves and seeds, as well as the skins the snakes shed each spring.
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How she did it..
~ In 1964, because of a gasoline shortage, Stephanie and her group began searching for a lightweight yet strong fiber to be used in tires.
~ The polymers (poly-p-Phenylene-terephthalate and polybenzamide) formed liquid crystal while in solution.
~ The solution, which was usually thrown away, was fluid and cloudy, rather than clear and viscous.
~ She decided to observe it under the microscope, and observed that the fibers looked like strands of spaghetti lined up one after the other.~ She persuaded the man in charge of the spinneret to spin the solution into thread.
Kevlar
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The many uses of Kevlar
~Bullet-resistant helmets and body armour
~Suspension cables for bridges
~Break pads for cars
~Hiking and camping gear
~Outer shells for spacecrafts
And 150 or more uses!
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Why we like the invention and its benefits
We like the invention because it is very useful and has saved many lives. Here are some of its benefits:
~When police officers etc. wear this bullet-resistant vests made of Kevlar, they will be partially protected from bullets, thus ensuring the safety of the police officers.
~If high-standing officials or VIPs wear it, they will also be partially protected from bullets.
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Good values/attitudes Stephanie displayed
~Perseverance
~Determination
~Patience
~Observance
~Diligence
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Why we find the invention interesting…
We find it interesting because…
~It is strong enough to pull a train
~It is five times stronger than steel
~It is bullet-resistant
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Watch This Video!!!
http://www.youtube.com/watch?v=NvoblcEvrvI
This is all You need to know about Kevlar and its inventor!
ENJOY!
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Quiz Time!Good Luck!
The Small Print: Prizes Will Be Given!
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Question 1 – For Boys
Name one thing Kevlar is used in?
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Question 2 – For Girls
When was the inventor born?
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Question 3 – For Everyone
Where did Stephanie Kwolek grow up in? (Give the full answer)
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THE END
Thank you for listening!
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Credits
~Wikipedia
~Google Images
~Answers.com
~And all other sites on Stephanie Kwolek