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Polymers and Composites

Polymers and Composites. Balloon. Polymer. Poly = Many A large, complex molecule built from smaller molecules joined together in repeating patterns. Examples. Synthetic Polyester Nylon Plastics Natural Starches Meat proteins Egg proteins. Forming Polymers. Mostly carbon compounds

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Polymers and Composites

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  1. Polymers and Composites

  2. Balloon

  3. Polymer • Poly = Many • A large, complex molecule built from smaller molecules joined together in repeating patterns

  4. Examples • Synthetic • Polyester • Nylon • Plastics • Natural • Starches • Meat proteins • Egg proteins

  5. Forming Polymers • Mostly carbon compounds • 2 properties allow this • Can form 4 bonds (gains, loses, share 4 electrons) • Make a variety of structures

  6. Types of Structures • Straight chain • Branched chain • Ring

  7. Carbon’s Friends • Most common is H • O • N • P • S • Halogens

  8. Monomers • Mono = 1 • These are the smaller molecules that repeat to build the polymers • Polymers form when chemical bonds link large numbers of monomers in a repeating pattern

  9. Paper Clips

  10. Natural Polymers • Cellulose: cell walls of fruits and veggies. • Starches: Sugar molecules • Silk: Silk worm cocoons • Wool: Sheep’s fur • Figure Nails and muscles: proteins • Amino acids

  11. Synthetic Polymers • Raw mats = coal or oil • Plastics • Carpet • Clothing • Glue • Gum (do not swallow) • Pg 121

  12. Comparing Polymers • Synthetic = cheaper, lasts longer • Natural = environmentally friendly

  13. Composites • Combine 2 or more substances in a new material with different properties • Many include 1 or more polymers

  14. Composite Uses • Fiberglass • Flexible but strong! • Fishing polls • Tennis rackets

  15. Too Much • Plastics can last forever but some are only used for a day • Recycling • Money • Island of plastic

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