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Chemistry 1010

Chemistry 1010. Polymers. Monomer. monos - one meros - parts. Polymers. poly - many meros - parts. From yahoo images. Polymer. A large molecule made from many identical repeating small molecules. From yahoo images. Polymerization. Process by which monomers are converted to polymers.

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Chemistry 1010

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  1. Chemistry 1010 Polymers

  2. Monomer • monos - one • meros - parts Polymers • poly - many • meros - parts From yahoo images

  3. Polymer A large molecule made from many identical repeating small molecules From yahoo images

  4. Polymerization • Process by which monomers are converted to polymers From yahoo images

  5. Natural Polymers • Starch • Proteins • Wood • Cotton • Silk • DNA From yahoo images

  6. Properties of Polyethylene • Very Soft and Flexible • Low Melting Point • Formed into Shapes Easily • Used as Plastic Wrap, Cups, Jugs, Wire Insulation, Film, Grocery Bags

  7. Properties of Polystyrene • More Brittle Than Polyethylene • A Liquid That Turns Solid In Air • Makes Good Insulation • Makes Clear and White Foam Cups • Makes Good Packing Material

  8. Properties of Polyvinylchloride • Called PVC • Makes White Plastic Pipe • Soft and Flexible • Makes The Vinyl Seat Coverings • Vinyl Chlorides are Carcinogenic

  9. Properties of Polybutadiene • Soft And Pliable When A Strait Chain • Used For Car Tires • Used For Rubber Bands • Will Cross Link And Become Harder

  10. Cross Linking • Causes polymer to become much more rigid • Not as easily decomposed • Becomes an environmental issue • Can control how brittle a substance is by changing amount of cross link • Can sell tires with different mileage ratings

  11. Types of Plastic

  12. So What Do the Words Mean? • Recycle • Reuse

  13. What can be Recycled • Metal • Glass • Paper Plastic?????

  14. Problems with Recycling Polymeric Materials • De-polymerization is not possible today • We can only grind up polymeric material and use it in other forms • At best we can use 30% old material with 70% new material • Not Profitable • Public Support is Low

  15. Conditions For Recycling • Must be the same type of polymer • Must be the same color • Must be absolutely clean • The less cross linking the better

  16. Uses for Used Polymers • Reuse in same product up to 30% • Ground up and glued together like particle board • Used as an insulation • Used in carpet fibers

  17. The Answer - The Three R’s • Reduce • Reuse • Recycle

  18. Is Recycling a Political Gimmick? • Glass vs plastic on the shelves • No real recycling plastics are used • Difficult to find a recycling center Look at barrels and recycling costs

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