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POLYMERS

POLYMERS. What do all of these objects have in common ?. Rope Nylon Plastic PVC Hair Proteins Starch Cellulose Rubber. Cotton Chewing gum styrofoam. What are Polymers?. Polymer : a long chain made up of repeating subunits called monomers, connected by covalent bonds

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POLYMERS

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  1. POLYMERS

  2. What do all of these objects have in common? Rope Nylon Plastic PVC Hair Proteins Starch Cellulose Rubber • Cotton • Chewing gum • styrofoam

  3. What are Polymers? • Polymer: a long chain made up of repeating subunits called monomers, connected by covalent bonds • Natural vs. Synthetic Polymers • Proteins (Amino Acids) • DNA (Nucleic Acids) • Carbohydrates

  4. Formation does not occur by itself, must be initiated by a series of chemical events/promotors • Two Types: • Condensation • Addition

  5. 1. Condensation Reaction Monomers have functional groups on the ends Ester or Amide Bond Water is a product Examples…

  6. Condensation Polymers Example #1 – Nylon 6-6 – Amide Bond Polymerizing + Note: Condensation polymers that contain amide bonds are called nylons or polyamides Several thousand

  7. Condensation Polymerization Ex #2 – Dacron (Mylar) – Tires, fibers to make rope and clothing (stockings) Polymerizing Polyester

  8. 2. Addition Polymerization • Uses a C=C addition reaction • all monomers require a double bond • Chains are formed by the rearrangement of bonds, without the loss of an atom • Reminder: polymerizing promotors are required for the reaction to proceed

  9. Addition Polymer Example #1: Ethene/ethylene Named after monomer Polyethylene • Actually a very long alkane • Found in plastic containers

  10. Addition Polymers Example 2 Propene/Propylene Polypropylene Ex: Yellow Rope

  11. Practice Question #1 A) What type of polymerization would occur with the following monomer? B) Draw three repeating subunits of the polymer that monomer would create.

  12. Practice Question #1 - Answer What type of polymerization would occur with the following monomer? Draw three repeating subunits of the polymer that monomer would create.

  13. Practice Question #2 What type of polymerization would occur given the following two monomers? Draw one subunit of the polymer they would create.

  14. Practice Question #2 - Answer What type of polymerization would occur given the following two monomers? Condensation Polymerization Draw one subunit of the polymer they would create.

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