HOW TO MAKE ANYTHING BULLET PROOF
BBC
HOW TO MAKE ANYTHING BULLET PROOF
  • 강지희
  • 승인 2019.05.09 17:40
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Imagine what this bullet could have done…
Imagine what this bullet could have done…

Imagine what this bullet could have done… Fifty years ago, a chemist working at DuPont in the Us created a plastic that was light, flexible and seriously strong. in fact, stephanie Kwolek had invented a substance that was five times stronger than steel of the same weight, making it tough enough to stop bullets and deflect blows from knives. Poly-paraphenylene terephthalamide, or Kevlar as it is more commonly known, has since been used in everything from bulletproof vests to soldiers’ helmets. It’s even used for protective shielding on the international space station. 

A DuPont worker adjusts the valve on a Kevlar spinning machine But half a century since its creation, can Kevlar keep up with advances in science and engineering to retain its crown as the go-to protective substance? or will a new generation of materials allow us to make anything bulletproof? Kevlar is a polymer. Polymers are substances made from a large number of repeating units – monomers – that are joined together. in Kevlar, these monomers are arranged in ring-like structures similar to those seen in benzene. it is this structure that is key to the material’s properties.

 

Bullets And Benzene

 

KEVLAR IS FIVE TIMES STRONGER THAN STEEL OF THE SAME WEIGHT

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