#9.17C
Recall that a polymer is a substance of high average relative molecular mass made up of small repeating units
#9.18C
Describe:
a) how ethene molecules can combine together in a polymerisation reaction
b) that the addition polymer formed is called poly(ethene)
(conditions and mechanisms not required)
#9.19C
Describe how other addition polymers can be made by combining together other monomer molecules containing C=C, to include poly(propene), poly(chloroethene) (PVC) and poly(tetrafluoroethene) (PTFE)
(conditions and mechanisms not required)
#9.20C
Deduce the structure of a monomer from the structure of an addition polymer and vice versa
#9.21C
Explain how the uses of polymers are related to their properties and vice versa: including poly(ethene), poly(propene), poly(chloroethene) (PVC) and poly(tetrafluoroethene) (PTFE)
#9.22C
Explain:
a) why polyesters are condensation polymers
b) how a polyester is formed when a monomer molecule containing two carboxylic acid groups is reacted with a monomer molecule containing two alcohol groups
c) how a molecule of water is formed each time an ester link is formed
#9.23C
Describe some problems associated with polymers including the:
a) availability of starting materials
b) persistence in landfill sites, due to non-biodegradability
c) gases produced during disposal by combustion
d) requirement to sort polymers so that they can be melted and reformed into a new product
#9.24C
Evaluate the advantages and disadvantages of recycling polymers, including economic implications, availability of starting materials and environmental impact
#9.25C
Recall that:
a) DNA is a polymer made from four different monomers called nucleotides (names of nucleotides not required)
b) starch is a polymer based on sugars
c) proteins are polymers based on amino acids