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10 Jan 2011
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Start for unit 3 test:
-Polymers: are large, usually chainlike molecules that are built from small molecules called
monomers
-Polymer Types:
1. by components
a. homopolymers: contains a single type of monomers
example 1: Polyethlene CH2=CH2
example 2: Teflon CF2=CF2
b. copolymers: contains two diff. types of monomers
example 1: nylon H2N-(CH2)6 NH2
example 2:HO2C-(CH2)4 CO2H
2. By mechanism of polymerization
a. addition polymerization
-monomers add together
-initiated by a free radical (something that has a single unpaired
electron)
-monomer is an alkene
- examples: Polyethylene and PVC
b. condensation Polymerization:
-a small molecule, such as H20 is produced
-nucleophilic substitution
-example: hexamethylenediamine
-Proteins are polymers of amion acids
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