Condensation Polymers (Polyesters)

Cards (23)

  • 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
    • Remove OH from acid and H from alcohol
    • Form water molecule
    • Create ester link
    • Repeat with multiple monomers
  • What type of acid is used in making polyesters?
    Dicarboxylic acid
  • What type of alcohol is used in making polyesters?
    Diol
  • 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 ester link in polyesters?
    The bond between dicarboxylic acid and diol
  • Why is the initial product of polyester formation called a dimer?
    It consists of two monomers combined
  • What must be done to show the repeating unit of a polyester?
    Remove OH and H from ends
  • What notation is used to represent the number of monomers in polyesters?

    The letter n
  • How many water molecules are formed per repeat unit in polyesters?
    Two water molecules
  • Why are they called condensation polymers?
    They release water during formation
  • What is a requirement for monomers in condensation polymers?
    Each must have at least two functional groups
  • What is an example of a dicarboxylic acid used in polyesters?
    Ethane dicarboxylic acid
  • What is an example of a diol used in polyesters?
    Ethane diol
  • What polyester is formed from ethane dicarboxylic acid and ethane diol?
    Poly ethyl ethanoate
  • What is a key characteristic of polyesters regarding biodegradability?
    They are generally biodegradable
  • How do polyesters differ from addition polymers like plastics?
    Polyesters are biodegradable, plastics are not
  • What do microorganisms do to polyesters?
    Break down the ester links
  • What is the environmental impact of addition polymers?
    They stay in the environment for ages