what is addition polymerisation
formed from alkenes
the double bond in alkenes ope up and join together to make long chains called addition polymers
what is condensation polymerisation
usually involves two different types of monomer
each monomer has at least two different functional groups, each functional group reacts with a group on another monomer to form a link, creating polymer chains
each time a link is formed a small molecule (usually water) is lost
polyesters and polyamides