P l a s t I c s<br />By: Alison Luk<br />Beatrix Lee<br />Sally Campbell<br />
Bonds in Plastics<br />Covalent Bond<br />Atoms share electrons in outer shell<br />Strongest type of bonding <br />Primar...
Thermosets and Thermoplastics<br />Macromolecules – long chains of molecules<br />Secondary bonds – weak forces of attract...
Elasticity in thermoplastics<br />Weaker secondary bonds enable elasticity<br />When under load within elastic limit, plas...
Heating thermosets and thermoplastics<br />Recyclable<br />
Properties of Plastics<br />Stronger<br />More brittle<br />Low tensile elongation<br />Low viscosity (in liquid form)<br ...
Chemical-resistant containers <br />e.g.  Food Containers<br />Hinges<br />Polypropene/Polypropylene<br />Fishing nets<br ...
HDPE:  <br />Bottles<br />Pipes<br />Bowls<br />Milk Crates<br />Buckets<br />Polyethene/Polyethylene<br />LDPE:  <br />Pa...
Varnish<br />Cushioning & buoys in boat hulls<br />Skateboard wheels<br />Polyurethane(can be thermoplastic or thermoset)<...
Textiles <br />i.e. clothing<br />Electrical fittings <br />i.e. plugs<br />Wood adhesives<br />Urea-Formaldehyde<br />
Disposing Plastics<br />Dumping in Landfills<br /><ul><li>Destroys the environment
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Plastic

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Plastic

  1. 1. P l a s t I c s<br />By: Alison Luk<br />Beatrix Lee<br />Sally Campbell<br />
  2. 2. Bonds in Plastics<br />Covalent Bond<br />Atoms share electrons in outer shell<br />Strongest type of bonding <br />Primary bonds in plastics<br />
  3. 3. Thermosets and Thermoplastics<br />Macromolecules – long chains of molecules<br />Secondary bonds – weak forces of attraction<br />Thermoplastic<br />Primary bonds – strong forces of attraction<br />Thermosetting plastic<br />
  4. 4. Elasticity in thermoplastics<br />Weaker secondary bonds enable elasticity<br />When under load within elastic limit, plastic can return to original form<br />When load exceeds elastic limit, plastic deforms<br />Some plastics also suffer from creep <br />
  5. 5. Heating thermosets and thermoplastics<br />Recyclable<br />
  6. 6. Properties of Plastics<br />Stronger<br />More brittle<br />Low tensile elongation<br />Low viscosity (in liquid form)<br />Higher temperature resistance<br />Tougher (more impact strength)<br />Less brittle<br />High tensile elongation<br />High viscosity (when liquid)<br />Thermosetting plastic<br />Thermoplastic<br />
  7. 7. Chemical-resistant containers <br />e.g. Food Containers<br />Hinges<br />Polypropene/Polypropylene<br />Fishing nets<br />Bottle crates<br />Medical equipmente.g. syringes<br />
  8. 8. HDPE: <br />Bottles<br />Pipes<br />Bowls<br />Milk Crates<br />Buckets<br />Polyethene/Polyethylene<br />LDPE: <br />Packaging film<br />Carrier bags<br />TV cable<br />Toys<br />Detergent &apos;squeezy&apos; bottles <br />
  9. 9. Varnish<br />Cushioning & buoys in boat hulls<br />Skateboard wheels<br />Polyurethane(can be thermoplastic or thermoset)<br />Shoe soles<br />Artificial sponges<br />
  10. 10. Textiles <br />i.e. clothing<br />Electrical fittings <br />i.e. plugs<br />Wood adhesives<br />Urea-Formaldehyde<br />
  11. 11. Disposing Plastics<br />Dumping in Landfills<br /><ul><li>Destroys the environment
  12. 12. Non biodegradable
  13. 13. Hazardous to wildlife</li></ul>Via Incineration Process<br /><ul><li>Releases harmful toxic fumes into the atmosphere</li></ul>RECYCLE<br /><ul><li>Designated recycling bins
  14. 14. Plastic Resin Symbol
  15. 15. easily distinguished
  16. 16. faster recycling process</li>

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