Condensation polymers

Cards (21)

  • What type of polymers are polyesters classified as?
    Condensation polymers
  • What are polyesters made using?
    Ester links
  • What is the process of forming polyesters from monomers?
    • Combine dicarboxylic acid and diol
    • Dicarboxylic acid gives up OH group
    • Diol gives up H atom from OH group
    • Water molecule is formed
    • Ester link is created
  • What type of monomers are used to create polyesters?
    Dicarboxylic acid and diol monomers
  • What does a dicarboxylic acid monomer contain?
    Two carboxylic acid groups
  • What does a diol monomer contain?
    Two alcohol groups
  • What do the colored rectangles in molecular diagrams represent?
    The rest of the molecule
  • What happens to the dicarboxylic acid during polymer formation?
    It gives up its OH group
  • What does the diol give up during the formation of polyesters?
    A hydrogen atom from its OH group
  • What is formed when the dicarboxylic acid and diol combine?
    A water molecule
  • What is the bond formed between the dicarboxylic acid and diol called?
    Ester link
  • What is a dimer in the context of polyesters?
    A combination of two monomers
  • How do we represent repeating units in condensation polymers?

    Using the letter n
  • Why do we put 2n in front of H2O in the polymer equation?
    Because two water molecules are formed
  • Why are these polymers called condensation polymers?
    They release water during formation
  • What small molecule is typically released during the formation of polyesters?
    Water
  • What are the two functional groups required for condensation polymers?
    Carboxyl and alcohol groups
  • What is the name of the polyester formed from ethane dicarboxylic acid and ethane diol?
    Poly ethyl ethanoate
  • Why are polyesters generally biodegradable?
    Bacteria can break down ester links
  • How do addition polymers differ from polyesters in terms of biodegradability?
    Addition polymers are generally not biodegradable
  • What are the key characteristics of condensation polymers?
    • Formed from monomers with at least two functional groups
    • Require at least two different functional groups
    • Release a small molecule (usually water) during formation