Question

Polymer used in bullet proof glass is:
A) Lexan
B) PMMA
C) nomex
D) Kevlar

Answer 1

As we know that thermoplastic polymer is a kind of polymer, when it is heated, hardened and cooled then it becomes liquefy. That type of process repeated again and again, it is completely reversible.

Complete answer:

Lexan is a type of polycarbonate; polycarbonate is incredibly useful plastic for application requiring transparency and high impact resistance.
Lexan is unbreakable. The reason is that it is actually softer, it will scratch easier, it is not as rigid and will take more impact, it is less brittle It can find thick polycarbonate sheets with bullet resistant rating used as protective windows in security situations. It is transparent to light.
Lexan is a thermoplastic polymer that can be formed through any kind of melt processing techniques, such as, injection molding, extrusion, compressions molding, and vacuum forming. The processing condition (temperature, pressure, time) depends on the grade of the polymer, kind of processing, and dimensions and geometry of the final molded product. If we talk about the advantage of Lexan, it is stronger and resists breakage much better. It has poorer optical properties and it is slightly expensive.

Therefore, the correct answer is A.

Note: Lexan is an amorphous solid, that’s meaning is crystalline structure and is most solid in nature. It has many applications. Such as electronic components, it is used in electrical and telecommunication hardware. It also works as a dielectric in high-stability capacitors. In construction materials, used as dome lights, flat and sound walls. Lexan is also applicable in data storage like compact discs, DVDs