During polymerisation reaction, monomers have their pi bond broken
the electrons from each pi bond make a sigma bond with a neighbouring carbon atom on a different monomer; connecting the monomer chemically, generating a saturated polymer with long carbon chains
we can draw the structural formula of the repeating unit using square brackets to show that it is part of a polymer
A) plastic bags
B) poly(propene)
C) packaging
D) polystyrene
E) non-stick coating
Deducing the structures
draw the monomer structure so that the C=C bond is the focus of the diagram
draw square brackets round the monomer
C=C to C-C + draw two line extending from each C atom through the square brackets
