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What is a Polymer?

What is a Polymer?. Withrow University High School May 2008. Definition. The word polymer comes from the _________ language. poly  - mer many - parts So, polymer means “__________”. M. M. M. M. M. M. M. M. A Polymer Molecule.

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What is a Polymer?

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  1. What is a Polymer? Withrow University High School May 2008

  2. Definition The word polymer comes from the _________ language. poly - mer many - parts So, polymer means “__________”.

  3. M M M M M M M M A Polymer Molecule • A polymer is a _________ ______________. • This giant molecule is a long _________ of ______________ _____________ units. • These repeating units are called ___________. • A polymer molecule are made up of ________ of monomers.

  4. Cotton from plants is a natural polymer and is used to make clothing Crustacean shells are made of chitin, a natural polymer Natural latex from rubber tree is a polymer Silk from silk worms is used to make cloth “Carbs” like spaghetti are natural polymers Rubber can be used to make tires Wood is a natural polymer used for paper Proteins from eggs and other foods are also natural polymers or rubber bands! Natural Polymers

  5. Milk jugs are made from the synthetic polymer polyethylene (HDPE) Synthetic polymers are used to make specialty athletic clothing using polymer such as Polyester, Nylon, Lycra or spandex Polyethylene is used to make plastic sandwich bags Compact Discs are made from synthetic polymers such as polycarbonate Soda bottles are made from polyethylene terephthalate (PETE) Polystyrene is used to make Styrofoam cups and cd cases Can you think of any other types of man made polymers and their uses? Man-Made (Synthetic) Polymers

  6. Symbol • The pictures below represent a polymer chain. (draw it) • The “M” stands for ___________________.

  7. 3a. The ball returns to its original shape. 3b. The ball pushes off the ground 2. The ball changes shape when it hits the floor. 1. The ball drops 4. The ball bounces back up. Floor Elasticity makes a ball bouncy • An elastic object is able to change shape and return to its original shape.

  8. What’s going on inside? • The molecules stretch when a force is applied. • When the force is removed, the molecules return to their original shape.

  9. A polymer chain at rest A force pulls and stretches the polymer chain. A force pulls and stretches the polymer chain M M M M M M M M When the force is removed, the polymer chain goes back to its original shape, as long as it was not stretched too much! That would cause the bonds to break. M M M M M M M M M M M M M M M M Polymers make the best elastics

  10. Example Monomer • Mono = “One” Put it together with mer to get? • Tiny molecular unit that can chemically combine by bonds with other monomers to form a chain called a Polymer Ethylene monomer molecule (C2H4)

  11. Polymer Synthesis • combine chemically through covalent bonds to form long chain molecules. • For the double bond between the carbons is ‘opened’ up and attached to another atom of an ethylene monomer and the process continues as the molecule grows in size.

  12. How to Represent Polymers • Polyethylene (PE) • Plastic bags, milk jugs, sockets for hip joint replacements, etc. • Polyvinyl chloride (PVC) • Piping, house siding, turntable records, etc. • Polyvinyl Acetate (PVA) • Glue, binder for making sheets of paper, binder for paints

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