plastics

plastics

1. the history of plastics

   • 1860
     • celluloid
   • 1907
     • first polymeres
   • during WWII
     • new fibres
       • nylon
       • acrylic
   • most are from petrol

2. monomers and polymers

   • monomers
     • duplicating...
       • joining...
         • polymeres
   • that is polymerisation

3. types of plastics

   • thermoplastics
     • easy to recycle
   • thermosetting polymers
     • burns with heat
   • elastomers
     • like thermosseting but more elastic

4. plastic shaping techniques

   • extrussion
   • calendaring
   • injection
   • blow moulding
   • compression
   • vaccum forming
   • spin or rotational moulding

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