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Rheometrics Dynamic Spectrometer (RDS)

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Used to measure viscous-elastic properties of a polymer melt


The Rheometrics Dynamic Spectrometer (RDS) is an oscillatory rheometer by which viscous-elastic properties of the polymer melt can be measured between two oscillating plates (both parallel- and cone-plate available). This technique is very suitable to obtain rheological data in the lower shear rate range (appr. 0.1-15 s-1), using only very limited material (typically <100 g.). Elastic and viscous modulus data can be discriminated, by which it is possible to ascertain if the material behaves more elastic or more viscous. These measurements can be done at different temperatures and frequencies allowing for good characterization of the flow behavior of the polymer melt. By making a so-called Van Gurp-Palmen plot, branching or cross-linking can be determined as well.

Technical specifications

  • Maximum temperature : 450°C
  • Minimum temperature : 25°C
  • Maximum shear rate : 15 Hz
  • Minimum shear rate : 0.15 Hz
  • Minimum sample amount : 5 gram per measurement