Lecture 18
Lecture 18
Lecture 18
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Polymer Macrostructure vs. Microstructure<br />
- Macrostructure: ‘what the whole molecule looks like’<br />
- Clearly, a huge influence on properties ---> viscosity, etc.<br />
- Microstructure: ‘how individual monomers or atoms are arranged’<br />
- One example: Alternating v. random copolymers…<br />
- Also: Stereochemical configurations<br />
Differences in microstructure can have a huge impact on polymer properties!<br />
Stereochemical configurations:<br />
-Polymerization of propylene…<br />
Same as…<br />
Stereogenic<br />
Center!<br />
CH 3<br />
CH 3<br />
n<br />
H<br />
n<br />
CH 3<br />
Conventional View<br />
There’s an H here, too…
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