Make two schematic plots of the logarithm of relaxation modulus versus temperature for an...

Make two schematic plots of the logarithm of relaxation modulus versus temperature for an amorphous polymer (curve C in Figure 15.8).

(a) On one of these plots, demonstrate how the behavior changes with increasing molecular weight.

(b) On the other plot, indicate the change in behavior with increasing crosslinking.

Figure 15.8 Logarithm of the relaxation modulus versus temperature for crystalline isotactic (curve A), lightly crosslinked atactic (curve B), and amorphous (curve C) polystyrene.

(From A. V. Tobolsky, Properties and Structures of Polymers. Copyright © 1960 by John Wiley&Sons, New York. Reprinted by permission of John Wiley&Sons, Inc.)