Cards (12)

  • Polymer
    substance or fibre with a molecular structure made up of smaller units bonded together.
  • Natural polymer
    polymer made from natural sources
  • What are the forms polymers can available in?

    film, bar, rod, granules, sheets
  • Thermoforming polymers

    polymers can be softened by heating and moulded into almost any shape
    can used in bending, vacuum forming, moulding and extrusions
    can be recycled
  • Thermosetting polymers
    cannot be reheated or reformed once they have been formed and cooled
    cannot be recycled
    excellent insulators
  • Name all thermoforming plastics
    -Polypropylene (PP)
    -Polythene (PE)
    -polystyrene (PS)
    -Polyvinyl chloride (PVC)
  • name all the thermosetting plastics
    melamine formaldehyde
    polyester resin
    epoxy resin
  • polythene
    thermoforming
    tough, flexible, easily moulded
    used for carrier bags, bin liners, washing up bottles
  • Polystyrene (PS)
    thermoforming
    lightweight, food safe, good impact strength
    used for disposable plastic cutlery, CD case , smoke detector, plastic models
  • Polypropylene (PP)

    thermoforming plastic
    good chemical, heat resistance and semi-rigid
    used bucket, bowls, crates , toys and bottle caps
  • Polyvinyl Chloride (PVC)

    thermoforming plastic
    resistant to corrosion, flexible, durable
    used for water pipes , window frames, raincoats
  • Melamine Formaldehyde (MF)
    Thermosetting plastic
    tasteless, odourless, chemical, heat, shrink, hard, scratch and impact resistant