Question

A new polymer isused to make buuletproof glass. your boss explains that the crystallinity has contributed to the toughness of this new material. comment briefly on what role crystallinity might play for this materials's toughness.

Answer 1

1. For example Bullet proof glass has uses in the military, defense and security, and in transaction windows at places like banks, gas stations, and other business that have a high probability of being robbed

2. It’s made out of multiple materials layered and joined together, because no one material has the properties needed to stop a bullet.

3. Polycarbonate is a thermoplastic polymer.

4. Polymers are large molecules composed of repeating structural units in long chains.

5. Polycarbonate has an ideal application in bulletproof glass, in that it has a very high strength, and is also optically transparent

6. Polycarbonate is often used as the “soft” material in bulletproof glass because it can flex back while holding shards of broken glass in place.

7. Polycarbonate is 30x stronger than acrylic, which is 17x stronger than a sheet of glass of equal thickness.

8. The two (or more) materials are then layered and molded together under heat and pressure to create a solid block of bullet resistant material.

9. However different manufacturers have different formulas for making their own brands of bullet proof glass which could differ by layering, materials used or both.

10. Depending on how it’s made and the thickness of the final product, the glass is rated on the level of protection it offers.