1. General, Organic, and Biological Chemistry Copyright © 2010 Pearson Education, Inc.1 Chapter 12 Alkenes, Alkynes, and Aromatic Compounds 12.4 Polymers of Alkenes

2. General, Organic, and Biological Chemistry Copyright © 2010 Pearson Education, Inc.2 Polymers Polymers are  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. General, Organic, and Biological Chemistry Copyright © 2010 Pearson Education, Inc.3 Polymerization  In polymerization, small repeating units called monomers join to form a long chain polymer.

4. General, Organic, and Biological Chemistry Copyright © 2010 Pearson Education, Inc.4 Common Synthetic Polymers

5. General, Organic, and Biological Chemistry Copyright © 2010 Pearson Education, Inc.5 Polymers from Addition Reactions

6. General, Organic, and Biological Chemistry Copyright © 2010 Pearson Education, Inc.6 More Monomers and Polymers

7. General, Organic, and Biological Chemistry Copyright © 2010 Pearson Education, Inc.7 Learning Check What is the starting monomer for polyethylene?

8. General, Organic, and Biological Chemistry Copyright © 2010 Pearson Education, Inc.8 Solution What is the starting monomer for polyethylene? Ethene (ethylene), CH 2 ═CH 2

9. General, Organic, and Biological Chemistry Copyright © 2010 Pearson Education, Inc.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. General, Organic, and Biological Chemistry Copyright © 2010 Pearson Education, Inc.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. General, Organic, and Biological Chemistry Copyright © 2010 Pearson Education, Inc.11 Recycling Plastics Recycling is simplified by using codes found on plastic items.

12. General, Organic, and Biological Chemistry Copyright © 2010 Pearson Education, Inc.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. General, Organic, and Biological Chemistry Copyright © 2010 Pearson Education, Inc.13 Solution A. Polyvinyl chloride B.Polypropylene C.Polystyrene 5 PP 6 PS 3 PVC