Which is/are correct about Kevlar here? (1) It is a...

Which is/are correct about Kevlar here?
(1) It is a polyamide
(2) It is used in making bullet proof vests etc
(3) It is homopolymer formed by addition reaction
(4) It is polymer of Terephthalic acid and 1,4 diamino benzene.
(a) $1,2,3$
(b) $1,2,4$
(c) $2,3,4$
(d) $1,2,3,4$

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Key Concepts

Applications in Protective Gear

Due to their high strength-to-weight ratio and durability, materials like Kevlar are widely used in protective gear, including bulletproof vests. Their ability to absorb and disperse energy makes them invaluable in applications requiring high impact resistance and safety.

Condensation Polymerization

Condensation polymerization is a reaction mechanism in which monomer units react to form a polymer with the simultaneous loss of small molecules. This is the method used in the synthesis of materials like Kevlar, contrasting with addition polymerization where no such byproducts are formed.

Aromatic Polyamides (Aramids)

Aromatic polyamides, also known as aramids, incorporate aromatic rings into their backbone. This structural feature imparts high tensile strength and thermal stability, making aramids ideal for demanding applications such as body armor and other high-performance materials.

Polyamide

Polyamides are polymers characterized by the presence of amide bonds linking their monomer units. They are typically produced via polycondensation reactions rather than addition reactions, a process that involves the elimination of small molecules like water or HCl during polymer formation.

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