What is the purpose of Kevlar?

When a bullet or other high-velocity projectile hits Kevlar®, the fibers essentially catch the projectile while absorbing and dissipating its energy. Due to the fully extended and perfectly aligned molecular chains within Kevlar® fiber, Kevlar® provides a strong protective barrier against slashes, cuts and punctures.

Why Kevlar is used in bulletproof vest?

Kevlar is the most commonly used material as armour for protection against bullets used in hand guns because of its impact resistance, high strength and low weight. These properties make Kevlar an ideal material to be used in bullet-proof vests as compared to other materials.

What is Kevlar and how does it work?

Kevlar is able to stop a bullet due to its molecular structure. It is a light, polyarylamide plastic fabric, which has a high tensile strength. When a bullet hits the vest, it tries to force it through the layers, but to do this it must push the fibres apart. The fibres are woven and resist this very effectively.

What are Kevlars properties?

Kevlar® has a unique combination of high strength, high modulus, toughness and thermal stability. It was developed for demanding industrial and advanced-technology applications. Currently, many types of Kevlar® are produced to meet a broad range of end uses.

Where does the name terephthalamide come from?

Terephthalamide is a benzenedicarboxamide. It derives from a terephthalic acid. Database Compilation Copyright © 2020 Wiley-VCH Verlag GmbH & Co. KGaA. Copyright © 2020 DigiLab GmbH.

How is terephthalamide used to prepare composites?

Poly (phenylene terephthalamide) have been used to prepare composites, in some instances, with improved interfacial bonding achieved by bonding agents.

What kind of phenylene is in terephthalamide?

Poly (p-phenylene terephthalamide) (PPTA), poly- p -phenylenebenzobisoxazole (PBO), poly {2,6-diimid-azo [4,5-b:4′,5′-e]pyridinylene-1,4- (2,5-dihydroxy)phenylene} (PIPD), and cellulose are all spun from LC (nematic) solutions.

How is terephthalic acid used as a raw material?

Terephthalic acid is used as a raw material to make terephthalate plasticizers such as dioctyl terephthalate and dibutyl terephthalate. It is used in the pharmaceutical industry as a raw material for certain drugs. In addition to these end uses, Terephthalic acid based polyesters and polyamides are also used in hot melt adhesives.