Interpretations of Polymer Fatigue

Through simultaneous application of several of these methods Sikka [144] has been able to characterize some molecular rearrangements in homogeneous fatigue. 

He fatigued in cyclic extension thin films (0.075 mm thick) of polystyrene (Tricite) 

906 Part of the band shifts to lower frequency at 888 cm. Shift amount is -18 cm .  

1376 Part of the band appears at a higher frequency of 1400 cm. Shift amounts to 24 cm . Rest of the band is resolved into bands at 

---