1. Organic Polymers

2. Organic Polymer Chemistry
Polymer: from the Greek, poly + meros, many parts. Any long-chain molecule synthesized by linking together single parts called monomers
Monomer: from the Greek, mono + meros, single part. The simplest unit from which a polymer is synthesized
Homopolymer: a polymer made of a single type of monomer
Copolymer: a polymer made of two or more different types of monomers combined

3. Notation & Nomenclature
Show the structure by placing square brackets around the repeat unit
n = average degree of polymerization
To name a polymer, prefix poly to the name of the monomer from which the polymer is derived

4. Synthetic Addition Polymers
Addition Polymerization: a polymerization in which monomer units with unsaturated carbon-carbon bonds are joined together without loss of atoms. For example:
The properties of polymers are dependent on the type of functional group attached to the monomer.

5. Polyethylenes

6. Polyethylenes

7. Cross-Linking
Some monomer functional groups have the ability to form cross-links.
Cross-linking is bonding of adjacent polymer strands
As a general rule, the more cross-linking present the more rigid and inflexible the polymer becomes.
Dienes (monomers with 2 unsaturated bonds) form strong cross-links
Sulphur is also used to create cross-links due to the fact it is able to form two covalent bonds. (vulcanization)

8. Homework
Please read section 2.1 and 2.2
Page 87 #1-3
Page 93 #1,2,4

9. Synthetic Condensation Polymers
Condensation polymerization: a polymerization in which chain growth occurs by a condensation reaction (removal of water) between difunctional monomers
Polyesters: A polymer formed by a condensation reaction that results in ester linkages between monomers.
Polyamides: a polymer formed by condensation reactions resulting in amide linkages between monomers.

10. Polyesters
Poly(ethylene terephthalate) (PET) is fabricated into plastic beverage containers

11. Polyamides Nylon 66 (from two six-carbon monomers)
during fabrication, nylon fibers are cold-drawn to about 4 times their original length, which increases crystallinity, tensile strength, and stiffness

12. Polyamides Kevlar is a polyaromatic amide (an aramid)
cables of Kevlar are as strong as cables of steel, but only about 20% the weight. Kevlar fabric is used for bulletproof vests, jackets, and raincoats

13. Recycling Codes

14. Recycling Codes

15. Homework
Please read section 2.4
Page 98 #1
Page 99 #1-6