BRAINCAKECondensation Polymers - Polyamides
Polyamides are condensation polymers in which the monomers are joined by amide links, -CONH-. They are made from two types of monomer: a diamine (two -NH2 groups) and a dicarboxylic acid (two -COOH groups). Each time an amine group reacts with a carboxylic acid group, an amide link forms and a molecule of water is eliminated. A diacyl chloride can be used instead of the acid, in which case HCl is eliminated and the reaction is faster.
Nylon-6,6 is made from hexane-1,6-diamine, H2N(CH2)6NH2, and hexanedioic acid, HOOC(CH2)4COOH. The name shows that each monomer has six carbon atoms.
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More in Amines, Amides, Amino Acids and Proteins
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All 12 lessons in Amines, Amides, Amino Acids and Proteins · All Edexcel A-level Chemistry topics