Sound speeds and laser induced damage in polystyrene.
Sound speeds for gigahertz frequencies were measured as a function of temperature from 25 degrees C to 110 degrees C in clean samples of polystyrene by stimulated Brillouin scattering. The effect on the sound speeds of annealing the polymer was shown. The glass transition temperature was determined to be 95 degrees C from which the number averaged molecular weight was found. Damage observations were made on the prepared sample and compared with those made on commercial samples.
Smith
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Wiggins
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