addition

• a polymer is made by joining together thousands of small, identical molecules (monomers)
• in addition polymers, the monomers are ALKENES

  and make polymers such as

  • poly(ethene)
  • poly(propene)
• In addition polymerisation reactions, many small molecules (monomers) join together to form very large molecules (polymers)
• • the monomer has a double carbon to carbon bond but the polymer has SINGLE carbon to carbon bond
  • name = poly (monomer)
• • brackets
  • single bonds between carbon and hydrogen
  • small n to the right : repeating unit

  
• the repeating unit has the same atoms as the monomer as no other molecule is formed in the reaction