Plastics

Plastics

1. Definition

   • They are man-made materials. Consist of large chain of polimers form linking monomers. The procces is called polymerization.

2. Classification

   • Thermoplastics
     • PET
     • HDPE
     • PVC
     • LDPE
     • PP
     • PS
     • Teflon
     • Metacrylate
     • Cellophane
     • Nylon
   • Thermosettings
     • Bakelite
     • Melamine
     • Polyester resin
     • Polyurethane
   • Elastomers
     • Neoprene
     • Natural rubber
     • synthetic rubber

3. How to produce plastics

   • Moulding techniques
     • Injection moulding
     • Blow moulding
     • Compresion moulding
   • Forming techniques
     • Calendering
     • Extrusion
     • Vacuum forming

4. Properties

   • Phisical
     • Mechanical
       • Hardness
       • Maleable and Ductile
       • Elasticity and Plasticity
       • toughness and brittleness
     • Electrical
       • Electrical conductivity
     • Thermal
       • Thermal canductivity
     • Acoustical
       • sounds conductivity
     • Optical
       • Opacity, transparency and traslucence
   • Ecological
     • Toxicity
     • Recyclability
     • Renewability
     • Biodegradability
   • Chemical
     • Corrosion
     • Oxidation
     • Permeability

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