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Lecture

Jan. 3 lecture

2 Pages
113 Views

Department
Chemistry
Course Code
CHM242H5
Professor
Judith C Poe

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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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Description
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 CH 2CH 2 example 2: Teflon CF 2CF 2 b. copolymers: contains two diff. types of monomers example 1: nylon H N-(CH ) NH 2 2 6 2 example 2: HO C2(CH ) 2 4 CO 2
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