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

(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 cross linking.

Transcribed Image Text:

Temperature (F) 150 200 104 250 300 350 400 450 105 103 105 102 104 10 103 102 10-1 10 10-2 10 50 100 150 200 250 Temperature ("C) Relaxation modulus, E, 10)(MPa) (sd) snjnpow uOexejey