Plastic Materials

Plastic Materials

1. Thermoplastics

   • Materials
     • Polythelene
       • Polysterene
         • PVC(
           • Polypropilene
             • PET
               • Teflon
                 • Polycarbonate
                   • Higly resistant to impaact and heat.
                 • higly resistan to chemicalls.Used for kitchen utensils
               • Suitable for food use. Used for bottles
             • A plastic that is easy to model and dye. Used for toys
           • Higly ressistan to abrasion and impact. Used in pipes.
         • A very lightweight plastic , used in packaging
       • The most common type of plastic .It offers good chemical resistance
   • Are plastics that are softened by heating and can be formed and melted as many times as we like.

2. Structure of the 3 types

   • Depending on the form of each polymer, we can classify them as thermoplastics ( seperate chains of polymers )Thermosets(criss crossed polymer chains) or elastomers ( coiled polymer chains)

3. Thermoset

   • Materials
     • Bakelite
       • Polyester resins
         • Melanime
           • Resistant to high temperatures and chemicals
         • Rigid and Brittle , they are usually strenghthened with fiber glass
       • A hard brittle , dark plastic that withstands heat very well strengthened. Used in car bodies
   • The polymer chains of thermoset plastics criss-cross to from networks

4. Elastomers

   • Materials
     • Rubber
       • Can be natural or synthetic. Used for tyres
       • Neoprene
         • Flexible, insulated and waterproof . Used for immersion suits
   • Elastomers are very flexible materials that recover their shape and dimensions when external forces stop bacting on them

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