A rheometer to measure the viscoelastic properties of polymer melts at ultrasonic frequencies

Academic Article


  • A rheometer which uses a piezoelectric ultrasonic composite oscillator has been developed to measure the viscoelastic properties, G′(ω) and G″(ω), of polymer melts at ultrasonic frequencies. The storage and loss moduli of an ethylene-tetrafluoroethylene copolymer melt were measured at six frequencies in the range 0.25×106-1.28×106 rad/s (between 40 and 200 kHz nominal frequency) and at a temperature of 280°C. This ultrasonic instrument operates at strain amplitudes ranging from about 10-8 to 10-3 and is therefore ideally suited for linear viscoelastic property measurements.
  • Authors

    Published In

    Digital Object Identifier (doi)

    Author List

  • Thomas V; Giacomin AJ; Wolfenden A
  • Start Page

  • 2395
  • End Page

  • 2401
  • Volume

  • 65
  • Issue

  • 7