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Plastics

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Plastics SVN3E Plastics Plastics are polymers, long chains of a repeating chemical pattern. Organic Synthetics Plastics are organic chemically in that they contain ... – PowerPoint PPT presentation

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Title: Plastics


1
Plastics
  • SVN3E

2
Plastics
  • Plastics are polymers, long chains of a repeating
    chemical pattern.

3
Organic Synthetics
  • Plastics are organic chemically in that they
    contain carbon.
  • But they are also synthetic most are
    manufactured from petroleum (oil) or natural gas.

4
Recycling
  • Most plastic can be broken down, melted, and
    reformed into new products in closed-loop
    production.

5
Recycling
  • However, only about 7 of plastic (about 30 of
    bottles) is recycled. The rest is disposed of in
    municipal waste and makes up 12 of the waste
    stream.

6
Different types
  • There are many different types of plastics
    because there are many different possible
    chemical structures.
  • Each type of recyclable plastic is identified
    with a number from 1 to 7 in the centre of the
    recycling symbol.

7
Polyethylene terephthalate
  • For example, bottles are often made from
    polyethylene terephthalate.

8
High density polyethylene
  • Other bottles are made from high density
    polyethylene, which can also be recycled into
    building materials.

9
Polyvinyl chloride
  • Pipes and building materials (and credit cards!)
    are made of polyvinyl chloride (PVC), which can
    be recycled into these materials and non-food
    bottles.

10
Polyvinyl chloride
  • When PVCs are burned, they create the extremely
    toxic chemical dioxin.

11
Low density polyethylene
  • Bags (grocery, garbage, sandwich) and plastic
    wrap and more bottles are made from low density
    polyethylene.

12
Polypropylene
  • Outdoor furniture and hair brushes and binders
    are made from polypropylene, which is also
    recycled into car parts and milk crates.

13
Polystyrene
  • Foam products (cups, insulation, egg cartons) are
    polystyrene.

14
Polystyrene
  • Foam products (cups, insulation, egg cartons) are
    polystyrene.
  • Recycling polystyrene is usually not
    cost-effective.

15
Other
  • Other plastics can include styrene, nylon,
    acrylic, polycarbonate, etc.

16
Bioplastics
  • Although plastics are usually made from fossil
    fuels, they can also be made from vegetable
    products. (E.g. potato starch contains polymers
    too.) These plastics are called bioplastics.
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