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Understanding Polymers: From Natural to Synthetic

Dive into the world of polymers, large molecules found in nature and made synthetically, such as polyethylene and Teflon. Learn about polymerization, monomers, and common synthetic polymers from addition reactions.

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Understanding Polymers: From Natural to Synthetic

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  1. Chapter 12 Alkenes, Alkynes, and Aromatic Compounds 12.4Polymers of Alkenes

  2. Polymers Polymersare • large, long-chain molecules • found in nature, including cellulose in plants, starches in food, and proteins and DNA in the body • also made synthetically, such as polyethylene and polystyrene, Teflon, and nylon • made up of small repeating units called monomers • made by reaction of small alkenes

  3. Polymerization • In polymerization, small repeating units called monomersjoin to form a long chain polymer.

  4. Common Synthetic Polymers

  5. Polymers from Addition Reactions

  6. More Monomers and Polymers

  7. Learning Check What is the starting monomer for polyethylene?

  8. Solution What is the starting monomer for polyethylene? Ethene (ethylene), CH2═CH2

  9. Learning Check Name the monomer used to make Teflon, and use four monomers to draw the condensed structural formula of a portion of a Teflon polymer.

  10. Solution Name the monomer used to make Teflon, and use four monomers to draw the condensed structural formula of a portion of a Teflon polymer.

  11. Recycling Plastics Recycling is simplified by using codes found on plastic items.

  12. Learning Check What types of plastic are indicated by each of the following codes? A. B. C. 3 PVC 5 PP 6 PS

  13. Solution A. Polyvinyl chloride B. Polypropylene C. Polystyrene 3 PVC 5 PP 6 PS

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