Condensation Polymers and Naturally Occurring Polymers

  • Created by: Abc312
  • Created on: 03-05-18 20:15
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  • Polymers
    • Condensation Polymers
      • Involves monomers with two functional groups
      • It is called condensation polymerisation because the monomers join and usually lose a small molecule such as water
      • The simplest condensation polymers contain two monomers with each with two of the same functional group(one on each side)
      • An example reaction would be:
        • A diol
          • Ethane diol
            • n HO-CH2-CH2-OH
            • n HO-?-OH
          • +
            • A dicarboxylic acid
              • Hexanedioic acid
                • n HOOC-CH2-CH2-CH2-CH2-COOH
                • n HOOC-?-COOH
              • ?
                • Condensation Polymer
                  • Polyester
                    • (-?-OOC-?COO-)n
                  • +
                    • Water
                      • 2nH2O
        • A box ? represents the carbon chain
        • n represents any number of monomers
      • The repeating unit of a polyester will always contain a carbon chain and ester links
    • Naturally Occurring Polymers
      • Amino Acids
        • They have two different functional groups in a molecule
          • They have a basic amino group, NH2
          • They have an acidic carboxyl group, COOH
        • They react by condensation polymerisation
          • This produces polypeptides
        • The simplest amino acid is glycine
          • H2NCH2COOH
          • This polymerises to make the polypeptide of
            • (-HNCH2COO-)n and n H2O 
        • Chains of amino acids are called proteins
          • The order of amino acids produces different proteins
      • Other polymers
        • DNA is vital for human life
          • It encodes genetic instructions
        • DNA is made from two polymer chains made from four different monomers
          • The monomers are called nucleotides


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