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Chinese Journal of High Pressure Physics  > 2010  >  24(3): 192-200 .
LIU Hai-Lu, ZHAO Xiu-Ying, SONG Zhen-Yu, WU Si-Zhu, ZHANG Li-Qun. Study on the Damping Properties of Nitrile Rubber under Pressure by Modified WLF Equation[J]. Chinese Journal of High Pressure Physics, 2010, 24(3): 192-200 . doi: 10.11858/gywlxb.2010.03.006
Citation: LIU Hai-Lu, ZHAO Xiu-Ying, SONG Zhen-Yu, WU Si-Zhu, ZHANG Li-Qun. Study on the Damping Properties of Nitrile Rubber under Pressure by Modified WLF Equation[J]. Chinese Journal of High Pressure Physics, 2010, 24(3): 192-200 . doi: 10.11858/gywlxb.2010.03.006
shu

Study on the Damping Properties of Nitrile Rubber under Pressure by Modified WLF Equation

doi: 10.11858/gywlxb.2010.03.006

  • Beijing University of Chemical Technology, College of Materials and Science and Engineering, Beijing 100029, China

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  • Corresponding author: WU Si-Zhu
  • Received Date: 30 Apr 2009
  • Rev Recd Date: 25 Aug 2009
  • Publish Date: 15 Jun 2010
    Abstract
  • According to time-temperature superposition, it is shown that at certain frequency, the higher temperature the lower modulus. At a certain temperature, the lower frequency the lower modulus, which indicates that elevated temperature and reduced frequency has the equivalent effects. Based on this, the mechanical properties of rubber materials at wide frequency can be obtained by the data in different temperatures. For studying the basic theory of the damping properties of rubber, a modified Williams-Lendel-Ferry (WLF) equation under pressure has been proposed in this work. According to the loss factor tan from DMTA experiments, the shift factors under different pressures might be calculated. Then, the mast curve of loss factor versus frequency could be plotted, in which the range of frequency spanned about ten orders of magnitude. The result showed that the peak of tan appeared below the reference temperature. With the increasing pressure, the glass transition temperature moved towards higher frequency, and enhenced by 1.5 orders of magnitude. This method offered the theoretical basis to quantitatively characterize the damping properties of rubber materials.

     

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