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Polymers — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryPolymers1 Mark
MCQ
Which of the following monomers form biodegradable polymers?
$a. 3-$hydroxybutanoic acid $+ 3-$hydroxypentanoic acid.
$b.$ Glycine $+$ amino caproic acid.
$c.$ Ethylene glycol $+$ phthalic acid.
$d.$ Caprolactum.
  • ✓
    $a$ and $b$
  • B
    $a$ and $c$
  • C
    $b$ and $c$
  • D
    $b$ and $d$
✓

Answer

Correct option: A.
$a$ and $b$
Poly$-\beta-$hydroxybutyrate $co-\beta-$hydroxy valerate $\text{(PHBV)}$ It is obtained by the copolymerisation of $3$ hydroxybutanoic acid and $3-$hydroxypentanoic acid$. \text{PHBV}$ is used in speciality packaging orthopaedic devices and in controlled release of drugs$. \text{PHBV}$ undergoes bacterial degradation in the environment.
Nylon$-2-$nylon $6:$ It is an alternating polyamide copolymer of glycine $\left(\mathrm{H}_2 \mathrm{N}-\mathrm{CH}_2-\mathrm{COOH}\right)$ and amino caproic acid $\left[\mathrm{H}_2 \mathrm{N}\left(\mathrm{CH}_2\right)_5 \mathrm{COOH}\right]$ and is biodegradable.

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