Question

The polymer used as packaging material in orthopaedic devices and for controlled drug release is:
A.Kevlar
B.$PHBV$
C.Glyptal
D.Bakelite

Answer 1

Hint: At first think about the applications and uses of Kevlar, $PHBV$, Glyptal and Bakelite compounds. The Poly($3 - $hydroxybutyrate-co-$3$-hydroxyvalerate) polymer is commonly known as $PHBV$. It is biodegradable.

Complete step by step answer:
$PHBV$ is used in controlled release of drugs, medical implants and repairs, speciality packaging, orthopaedic devices and manufacturing bottles for consumer goods.
So the correct option is B.
Additional Information:-Kevlar is a heat resistant and strong synthetic fiber. It is typically used in bulletproof vest, gloves, jacket, sleeve, chaps, combat helmet, ballistic face mask, cycle tires.
Glyptal is a polyester. It is formed by ethylene glycol and phthalic acid formed by step growth polymerization. It is used in the manufacture of paints and lacquers.
Bakelite was the first plastic made from synthetic components. It is a thermosetting phenol formaldehyde resin, formed from a condensation reaction of phenol with formaldehyde. The creation of a synthetic plastic was revolutionary for its electrical non conductivity and heat resistant properties in electrical insulators, radio and telephone casings. The characteristics of bakelite made it particularly suitable as a molding compound, an adhesive or binding agent, a vanish and a protective coating.
$PHBV$ is a thermoplastic linear aliphatic polyester. It undergoes bacterial degradation in the environment. It is brittle and has low elongation at break and low impact resistance. It is synthesized by bacteria as storage compounds under growth limiting conditions. It can also be synthesized from genetically engineered plants. Many other bacteria are also capable of producing it.

Note:
$PHBV$ is a polyhydroxyalkanoate type polymer. It is nontoxic, biocompatible plastic produced naturally by bacteria and a good alternative for many non biodegradable synthetic polymers. It is used in controlling release of drugs.