A) nylon 2-nylon 6
B) PHBV
C) buna-N
D) nylon-6, 6
Correct Answer: A
Solution :
Nylon-2-nylon-6 It is an alternating polyamide of glycine (containing two carbon atoms) and ammo caproic acid or 6-aminohexanoic acid (containing six carbon atoms). \[\underset{Glycine}{\mathop{n{{H}_{2}}N}}\,-C{{H}_{2}}-COOH+\] \[\underset{\text{Amino}\,\,\text{caproic}\,\,\text{acid}}{\mathop{n{{H}_{2}}N-{{(C{{H}_{2}})}_{5}}-COOH\xrightarrow{\,}}}\,\] \[\underset{\begin{smallmatrix} \\ \text{Nylon-2-nylon-6} \end{smallmatrix}}{\mathop{-\left[ NH-C{{H}_{2}}-\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\mathop{C}}\,-NH-{{(C{{H}_{2}})}_{5}}-\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\mathop{C}}\, \right]-}}\,\] It is a biodegradable step-growth copolymer.
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