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Section 15.2

Polymers

Polymer

n  a large, chainlike molecule built from many small molecules (monomers) that repeat within the polymer

monomer

polymer

Examples of polymers

n  Plastics –  Polymers that can be

heated and shaped –  All plastics are synthetic

n  Rubber –  A natural polymer

n  Fabrics –  Cotton, linen, wool are

natural –  Rayon, nylon, and

polyester are synthetic

1) Addition Polymers n  one type of polymer is formed from an addition

reaction of alkene monomers n  the monomer contains a double bond n  an addition reaction forms a new bond between the

monomers

n  To name the polymer add the prefix “poly” to the monomer name

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n Draw 2 units of the polymer

Let’s draw 2 units of the polymer formed from this monomer, and name it

n What would be the structure and name of the polymer formed from chloroethene?

n polychloroethene

Condensation Polymers

n Monomers are combined through multiple condensation reactions (reactions that produce water)

n Each monomer must have two functional groups within it

All condensation polymers have

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2 types of condensation polymers:

Polyester Nylon

1 monomer contains R-OH 1 monomer contains R-COOH

1 monomer contains R-NH2 1 monomer contains R-COOH

n  Addition or condensation?

n  addition polymer or condensation n  Addition or Condensation?

Addition or condensation?

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Assignment

n  Read pages 609-613 of your textbook

n  Questions –  Page 606 7-12

•  Omit 9c and 11 c,d –  Page 614 1-6 omit 6 c,d

–  Use tables 15.1 and 15.2 to help ID monomers