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A bullet fired into a disk of polyurethane — a type of plastic — may not burst out the other side.
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Rice research scientist Jae-Hwang Lee designed a modified version of the plastic to show what’s happening inside the material when it stops a bullet.
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“There may be applications for anything that is impacted at high speeds — body armor, satellites — anything that you don’t want destroyed,”
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Liquid polyurethane is a polymer.
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First the layers pressed together, as you might expect. Instead of breaking, however, they seemed to melt and mix like liquids. Then, a millionth of a second later, they were solid again — and the bead was locked inside.
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