Polystyrene

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Polystyrene

• By
• Susan L. Schylander
• Sheepshead Bay High School

http//www.psrc.usm.edu/macrog/styrene.htm
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• What keeps your hands cool and your coffee hot?
• What helps keep food fresher longer?
• What is lightweight yet strong?

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Polystyrene

• ITS inexpensive.
• IT can be hard or soft.
• It can be shaped into just about anything.
• Toys
• Hairdryers
• Drinking cups
• Computers
• Packaging
• Car parts
• Kitchen appliances
• StyrofoamTM is one brand of polystyrene foam

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Polystyrene at a glance

• Uses Thermoplastics . A
  thermoplastic is a material that can be molded
  and shaped when it's heated. Such as
• Popcorn ceilings

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Model of an engine manifold made of polystyrene
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• Solid polystyrene is used in products such as
  cutlery, yogurt and cottage cheese containers,
  cups, clear salad bar containers and video and
  audiocassette housings.

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• Cups, bowls, plates, trays, clamshell containers,
  meat trays and egg cartons and protective
  packaging for shipping electronics and other
  fragile items are made of foamed polystyrene.

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In the lining of racing helmets
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• The origin of the word "plastics" comes from
  Greek. Its original Greek root means "to form."

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Plastics!!!
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Make the world better!!
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The polystyrene monomer is made of
carbon-carbondouble bonds with a benzene ring
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Polymers are long chains of monomers
that is, small molecules which may react
chemically to link together with other molecules
of identical structure.
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POLYMERS
can be
Atactic
Syndiotactic
or
Crystalline
Amorphous
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Structural differences
REGULAR PATTERN
IRREGULAR PATTERN
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• Amorphous - having no ordered arrangement.
  Polymers are amorphous when their chains are
  tangled up in any old way. Polymers are not
  amorphous when their chains are lined up in
  ordered crystals

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Properties of Polystyrene

• 1. The Glass transition temperature of
  Polystyrene is 100º C.
• 2. It melts at 240ºC .
• 3. It softens in acetone (nail polish
  remover).
• 4. It is recyclable.

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Natural polymers include such things as tar and
shellac, tortoise shell and horns, as well as
tree saps that produce amber and latex.
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• Polymers have been with us since the
• beginning of time.

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