1. Notes 7-3

2. Forming Polymers Polymers form when chemical bonds link large numbers of monomers in a repeating pattern. Monomers are the building blocks of polymers. Mono = One Poly = Many

3. Natural Polymers Proteins (monomer = Amino acids) – Examples: proteins carry O 2 in blood, hair, nails, proteins in snake venom Carbohydrates (monomer = sugar) – Starches, cellulose DNA (monomer = nucleotides) Spider webs Silk Wool

4. Synthetic Polymers Man-made Plastics Many types of clothing Carpet Gum Toothpaste Styrofoam Nylon

5. Polymers video clip http://youtu.be/8YUiRKWPKl8

6. Composites Combines 2 or more substances in a new material with different properties Often involves one or more polymers Example: Wood is a composite of 2 polymers, cellulose and lignin Example: Ancient bricks were composites of straw and mud

7. Video Notes- Composites 20 facts http://youtu.be/tZhH2B-EI1I