A high molecular weight polymer in which amide linkages (CONH) occur along the molecular chain. They may be either natural or synthetic. Important natural polyamides are casein, soybean and peanut proteins, and zein, the protein of corn, from all of which plastics, textile fibers, and adhesive compositions can be made. Synthetic polyamides are typified by the numerous varieties of nylon, though some, e.g., “Versamide”, are quite different from nylon.See Nylon; polypetide; Protein; Aramid.
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