1_C2-Material Choices

1_C2-Material Choices

1. Nanotechnology

2. Polymerisation

   • Monomers
     • Ethene
       • LDPE
         • Low boiling point
         • Plastic bag
       • HDPE
         • Food containers
         • Plastic bottles
         • High boiling point
     • Chloroethene PVC
       • Plastic windows
       • Clothes
     • Propene
       • Plastic hinges
       • Kitchen utensils

3. Modifications

   • Plasticizers
     • Softens materials and increases flexibility
       • Weaker intermolecular forces
         • Low boiling point
       • Layers in the substance making it more flexible/fluid
     • Carcinogens- toxic
   • Cross linking
     • Sulphur atoms between polymer molecules so they cannot move
       • Vulcanisation
         • Tyres
           • Burning rubber = sulphur dioxide
             • Acid rain
         • Conveyor belt
       • Higher intermolecular forces
         • High boiling point
   • Chain length
     • Longer=Stronger
     • Shorter=Weaker

4. Fractional distillation

   • Crude oil
     • Hydrocarbons
       • Small or big + Heat
         • Vapourise
           • Condense
             • Top= Low boiling point + small chains
             • Bottom= High boiling point + Large chains

5. Type of material

   • Natural
     • cotton
     • Paper
     • Silk
     • Wool

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