Question

Which of the following polymer is biodegradable?

• A. $-(C{H}_2-\underset{Cl}{\underset{|}{C}}=CH-C{H}_2){-}_n$
• B. $-(C{H}_2-CH=CH-C{H}_2-C{H}_2-\stackrel{CN}{\stackrel{|}{CH}}){-}_n$
• C. $-(O-\underset{C{H}_3}{\underset{|}{CH}}-C{H}_2-\underset{O}{\underset{||}{C}}-O-\underset{C{H}_{2}C{H}_3}{\underset{|}{CH}}-C{H}_2-\underset{O}{\underset{||}{C}}){-}_n$
• D. $-(\stackrel{H}{\stackrel{|}{N}}-(C{H}_2{)}_6-\stackrel{H}{\stackrel{|}{N}}-\stackrel{O}{\stackrel{||}{C}}-(C{H}_2{)}_4-\stackrel{O}{\stackrel{||}{C}}){-}_n$

Answer 1

Answer: (C)

$-(O-\underset{C{H}_3}{\underset{|}{CH}}-C{H}_2-\underset{O}{\underset{||}{C}}-O-\underset{C{H}_{2}C{H}_3}{\underset{|}{CH}}-C{H}_2-\underset{O}{\underset{||}{C}}){-}_n$

In view of the general awareness and concern for the problems created by the polymeric solid wastes, certain new biodegradable synthetic polymers have been designed and developed. These polymers contain functional groups similar to the functional groups present in biopolymers.

Example- PHBV.

The correct option is [C].

$\underset{3-Hydroxybutanoicacid}{C{H}_3-\stackrel{OH}{\stackrel{|}{CH}}-C{H}_2-COOH}+\underset{3-Hydroxypentanoicacid}{C{H}_3-C{H}_2\stackrel{OH}{\stackrel{|}{CH}}-C{H}_2-COOH}\to \underset{PHBV}{-(O-\underset{C{H}_3}{\underset{|}{CH}}-C{H}_2-\underset{O}{\underset{||}{C}}-O-\underset{C{H}_{2}C{H}_3}{\underset{|}{CH}}-C{H}_2-\underset{O}{\underset{||}{C}}){-}_n}$