Polymerisation Copy essential keyword definitions into books;

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Alkanes, Alkenes and Polymers

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Presentation transcript:

Polymerisation Copy essential keyword definitions into books; Monomer = Small molecules which may join together. Polymer = A long chain of repeating monomer units. Polymerisation = The reaction in which monomers join to make polymers. The Polymer Party - YouTube

Poly(e)thene One important reaction of alkenes involves the joining together of alkene molecules. H C H C H C H C H C And lots more.. 1 2 3 4 5 thousands This is called addition polymerisation and is written as: Pressure high temperature catalyst n ethene poly(e)thene

Polypropene Ethene is only one alkene. Other unsaturated molecules such as propene, vinyl chloride and styrene can also be polymerised to produce a range of plastics. E.g. propene Poly(propene) n propene

PTFE Tetrafluoroethane is another alkene that is made into an important plastic used to coat non-stick pans: polytetrafluoroethane or PTFE. n tetrafluoroethene Poly(tetrafluoroethane) or PTFE

Cl C H Fill in the products that will be obtained from vinyl chloride Activity Fill in the products that will be obtained from vinyl chloride pvc C H Cl n n Vinyl chloride C Cl H

Some uses of plastics Poly(e)thene Polystyrene Polypropene Shopping bags Bottles Buckets Washing up bowls Polypropene Milk crates Rope Carpet fibres Polystyrene packing insulation Ball pens

Across Down 3) separate substances with different boiling points 1) Contain a double bond 7) saturated hydrocarbon 2) a series of molecules differing by a CH2 8) joining of many small molecules 4) breaking up a large molecules 9) full up: unable to add more atoms 5) the different substances collected from distillation 6) used to test for unsaturated molecules. 1 2 3 4 5 6 7 8 9