plastic materials

plastic materials

1. formed by polymers, which molecules are called monomers.

2. thermoplastics

   • can be melted
   • types
     • polyethylene
       • for packaging (pipes, containers)
     • polystyrene
       • lightweight and transparent (packaging, heat insulation)
     • PVC
       • resistant to abrasion and impact (pipes, cable insulation)
     • polypropylene
       • resistant, easy to model and dye (toys, folders)
     • PET
       • recyclable, trnasparent and easily to dye (bottles)
     • teflon
       • resistant to chemicals and high temperture, non-stick properties ( to cook)
     • polycarbonate
       • resistance to impact and heat, good optical transparency (mobile phone screem)

3. thermosets

   • can be melted or heated but not remelted
   • types
     • melamine
       • resistant to chemicals and high temperatures and easily to clean (kitchen cupboards)
     • bakelite
       • hard, brittle and dark but can break with high temperatures (plugs, accesories)
     • polyester resins
       • rigid and brittle (car bodies, domestic swimming pools)

4. elastomers

   • types
     • rubber
       • natural(latex) or synthetic, is elastic (tyres, rubber bands)
     • neoprene
       • flexible, insulated, waterproof (inmersion suits)
   • are flexible, can be melted but not remelted

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