Condensation polymers

• What is a condensation polymer?

  A polymer formed by losing small molecules
• How do condensation polymers differ from addition polymers?

  Condensation polymers lose small molecules during formation
• What are the two types of monomers used in condensation polymers?

  Monomers with two identical functional groups
• What are the functional groups in ethane-1,2-diol?

  Two alcohol groups
• What are the functional groups in hexane-1,6-dioic acid?

  Two carboxylic acid groups
• What happens when ethane-1,2-diol reacts with hexane-1,6-dioic acid?

  They form an ester and water
• What is produced when monomers react in condensation polymerization?

  Water molecules are produced
• What is a polyester?

  A type of condensation polymer formed from esters
• How do you draw the repeating unit of a condensation polymer?

  Draw two adjacent monomer units in brackets
• What symbol is used to indicate a large number in the repeating unit?

  The letter M
• If 1,000 molecules of each monomer are used, what is the value of n in the repeating unit?

  n is 1000
• What is the process of forming a condensation polymer?

  • Start with two different monomers
  • Each monomer has two identical functional groups
  • React to form an ester and water
  • Continue adding monomers to create a long polymer
• What are the key points to remember about condensation polymers?

  • Formed from monomers that are not alkenes
  • Small molecules like water are lost during formation
  • Resulting polymer is called a polyester
  • Repeating unit is drawn with brackets and 'M'