INTERACTION OF POLYMERS AND MECHANICAL WAVES 



313 



1000 

 800 



600 



400 

 300 



200 



100 

 80 



60 



40 

 30 



20 

 10 



10 X 

 8 



10^ 



0.2 



0.1 



100 



200 



400 600 1000 2000 4000 6000 10,000 



FREQUENCY IN CYCLES PER SECOND 



Fig. 1 — Viscosity and shear modulus of hevea rubber (cross-linked). 



400 



O liiO 



100 

 90 

 80 

 70' 

 60 

 50 



30 

 100 



4.0x10* 



200 300 



FREQUENCY 



400 500 600 800 1000 

 N CYCLES PER SECOND 



1.0 

 0.9 

 0.8 

 0.7 

 0.6 



0.3 

 2000 



Fig. 2 — Viscosity and shear modulus of polydimelhyl silo.xane (cross-linked). 



