Basic Principles of Polymer Chemistry - the Arts and Sciences page ...
Basic Principles of Polymer Chemistry - the Arts and Sciences page ...
Basic Principles of Polymer Chemistry - the Arts and Sciences page ...
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3)<br />
a)<br />
b)<br />
c)<br />
ii)<br />
i)<br />
ii)<br />
i)<br />
i)<br />
ii)<br />
iii)<br />
i)<br />
ii)<br />
iii)<br />
acid)<br />
<strong>Chemistry</strong> 5861 - <strong>Polymer</strong> <strong>Chemistry</strong> 11<br />
Step/Condensation Case: 4-aminobutyric acid → Poly(4-aminobutyric<br />
Some materials can be made by ei<strong>the</strong>r Step/Addition or Chain/Condensation<br />
Polyurethanes from<br />
Normal - Step/Condensation Case: diamines + bischlor<strong>of</strong>ormates<br />
(ClC(O)O~R~OC(O)Cl) vs.<br />
Bizarre - Step/Addition Case: diisocyanates (OCN~R~NCO) + diols<br />
Polyureas from<br />
Bizarre - Step/Addition Case: diisocyanates (OCN~R~NCO) + diamines<br />
Polyhydrocarbons from<br />
Normal - Step/Condensation Case: reduction <strong>of</strong> alkane dihalides<br />
Normal - Chain/Addition Case: Olefin polymerization<br />
Bizarre - Chain/Condensation: Diazomethane reaction<br />
C) Property Differences Due to Syn<strong>the</strong>tic Route<br />
1)<br />
Much more detail later<br />
a)<br />
b)<br />
c)<br />
Tremendous variation from batch to batch, lab to lab, route to route<br />
Chemical properties generally similar due to similarities in types <strong>of</strong> “chemical<br />
structures”<br />
Physical properties markedly different due to differences in “polymer structures”<br />
MW & MW distribution<br />
Crosslinking type <strong>and</strong> density<br />
End group identity<br />
©2002, Dr. Allen D. Hunter, Youngstown State University Department <strong>of</strong> <strong>Chemistry</strong>
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