Polymers
An overview of polymers including addition and condensation polymerisation.
- Created by: Becky
- Created on: 08-06-14 14:23
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- Polymers
- addition polymerisation
- alkenes are produced by cracking. (eg ethene)
- these are called monomers
- monomers can be added together in the right conditions to form very long molcules (polymers)
- right conditions include: high pressure and high temperature.
- Shown using displayed formula
- alkenes are produced by cracking. (eg ethene)
- Uses
- poly(ethene)
- low density
- plastic bags
- high density
- plastic bottles
- low density
- poly(propene)
- ropes and crates
- poly(chloroethene) (PVC)
- drainpipes, windows, floorings and clothing.
- Nylon
- textiles, rope and machine bearings
- poly(ethene)
- Condensation polymerisation
- When 2 monomers join a small molecule is made and lost.
- eg- water is made and lost
- This is how nylon is made
- needs 2 different types of monomer joining together alternatively.
- Uses the 'block diagram'
- one of the monomers is a rectangle with -COOH group at either end.
- The other monomer is pictured as a rectangle with a -NH2 group at either end.
- Those end groups are drawn with displayed formula.
- Having removed the water molecules slot the remaining molecules together.
- Those end groups are drawn with displayed formula.
- The other monomer is pictured as a rectangle with a -NH2 group at either end.
- one of the monomers is a rectangle with -COOH group at either end.
- When 2 monomers join a small molecule is made and lost.
- addition polymerisation
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