Question

Match the following additives to their respective functions:

• A. P-4; Q-2; R-1; S-3
• B. P-3; Q-1; R-2; S-4
• C. P-4; Q-1; R-3; S-2
• D. P-4; Q-1; R-2; S-3

Hint:

When dealing with additives in polymers, remember that antiozonants are typically used to prevent degradation from ozone exposure, flame retardants reduce flammability, impact modifiers enhance toughness, and nucleating agents improve crystallinity.

Answer 1

The Correct Option is D

"Let’s analyze the properties and functions of the given additives:
P. p-phenylenediamine is primarily used as an antioxidant in rubber and polymer materials, which protects them from oxidative degradation and extends their lifespan. Hence, p-phenylenediamine is associated with function 4 (Antiozonant). 
Q. Trixylyl phosphate is often used as a plasticizer and flame retardant. It works to increase the flexibility of polymers and also acts as a flame retardant in polymer systems. This makes it suitable for function 1 (Flame retardant). 
R. Polybutadiene rubber is a type of rubber used to improve impact strength in various materials like plastics. It is widely used to improve the toughness of materials, thus it fits with function 2 (Impact modifier). 
S. Talc is a mineral that acts as a nucleating agent in the formation of crystalline structures in polymers. It is also used as a processing aid in plastics to improve their stiffness and heat resistance. Therefore, it is best associated with function 3 (Nucleating agent). Thus, the correct matching is:
- P (p-phenylenediamine) -> 4 (Antiozonant)
- Q (Trixylyl phosphate) -> 1 (Flame retardant)
- R (Polybutadiene rubber) -> 2 (Impact modifier)
- S (Talc) -> 3 (Nucleating agent)
Therefore, the correct answer is (D).