Explain the preparation of Nylon-$2$-nylon-$6$.

(N/A) Nylon-$2$-nylon-$6$ is an alternating polyamide copolymer prepared by the condensation polymerization of glycine $(H_{2}N-CH_{2}-COOH)$ and amino caproic acid $(H_{2}N-(CH_{2})_{5}-COOH)$.
The reaction is as follows:
$n H_{2}N-CH_{2}-COOH + n H_{2}N-(CH_{2})_{5}-COOH \rightarrow -[NH-CH_{2}-CO-NH-(CH_{2})_{5}-CO]_{n}- + 2n H_{2}O$
It is a biodegradable polymer.