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Basic Principles of Polymer Chemistry - the Arts and Sciences page ...

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III<br />

I) Thermoset <strong>Polymer</strong>s<br />

1)<br />

2)<br />

3)<br />

Example<br />

a)<br />

a)<br />

b)<br />

c)<br />

<strong>Chemistry</strong> 5861 - <strong>Polymer</strong> <strong>Chemistry</strong> 9<br />

phenol-formaldehyde resin (above)<br />

Properties<br />

Insoluble<br />

Non-melting<br />

Flexibility ⇒ Extended Solids<br />

Thermoset (e.g., Phenol-Formaldehyde) vs. Thermoplastic <strong>Polymer</strong> (e.g., PE)<br />

J) Classification by Use<br />

1)<br />

2)<br />

3)<br />

4)<br />

5)<br />

Plastics<br />

Fibers<br />

Rubbers (Elastomers)<br />

Coatings<br />

Adhesives<br />

<strong>Polymer</strong>ization Processes<br />

A) Classification <strong>of</strong> <strong>Polymer</strong> Reactions at Stoichiometric <strong>and</strong> Mechanistic Scales<br />

1)<br />

2)<br />

Reaction Stoichiometric Classification<br />

a)<br />

b)<br />

a)<br />

Addition vs. Condensation <strong>Polymer</strong>ization<br />

determined by loss <strong>of</strong> weight (or not) on polymerization<br />

Mechanistic Classification<br />

Step-Growth (Step-Reaction) vs. Chain-Growth (Chain-Reaction)<br />

©2002, Dr. Allen D. Hunter, Youngstown State University Department <strong>of</strong> <strong>Chemistry</strong>

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