Unit 3-Plastics
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What everyday materials are examples of polymers?
Plastics
What is a polymer?
A long chain molecule made by joining many small molecules called monomers.
What is a monomer?
A small unsaturated molecule that can join to form a polymer
What do all addition monomers contain?
A carbon to carbon double bond (C=C)
Why must monomers be unsaturated?
C=C bond can open and form polymer chains.
What is addition polymerisation?
A reaction where unsaturated monomers join to form a polymer
What is formed in addition polymerisation besides the polymer?
No other product is formed
How are polymer names related to monomer names?
The polymer name has “poly” in front of the monomer name.
What is a repeating unit?
The shortest section of a polymer chain that repeats to form the whole polymer.
What difference will you see in the diagram for repeating unit and monomer?
A repeating unit has two single bonds extending out the sides; a monomer has a C=C double bond.
How do you draw a polymer from a monomer?
Break the C=C, extend the bonds and repeat the unit (usually three times).
How do you draw a monomer from a polymer?
Identify the repeating unit and reinsert the C=C double bond.
What is the monomer for poly(ethene)?
Ethene
What is the monomer for poly(chloroethene)?
Chloroethene
What is the polymer made from tetrafluoroethene?
Polytetrafluoroethene
What is the name of the monomer which would make this polymer?
Propene
What would be the repeating unit and monomer for this polymer?
