title: Sound speeds and laser induced damage in polystyrene.
abstract: 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.
authors.forename: D M
authors.initials: DM
authors.lastname: Smith
authors.forename: T A
authors.initials: TA
authors.lastname: Wiggins