Stability of adsorber resins under mechanical compression and ultrasonication

Different adsorber and ion exchange resins have been sonicated with ultrasound of different frequencies in a fixed bed. Afterwards, the sonicated particles were investigated by scanning electron and light microscopy. Also, different mechanical properties, like fracture load, maximum flattening and Y...

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Bibliographic Details
Published in:Polymers for advanced technologies 2002-05, Vol.13 (5), p.391-400
Main Authors: Breitbach, M., Bathen, D., Schmidt-Traub, H., Ebener, H.
Format: Article
Language:English
Subjects:
particle characterization
particle strength
polymeric resins
ultrasonic stability
ultrasound
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Summary:Different adsorber and ion exchange resins have been sonicated with ultrasound of different frequencies in a fixed bed. Afterwards, the sonicated particles were investigated by scanning electron and light microscopy. Also, different mechanical properties, like fracture load, maximum flattening and Young's modulus were measured in compression tests and compared to the results of the ultrasonication experiments. Cavitational collapses cause cracks in resins with a high fracture load and a high Young's modulus as well as a low deformation at fracture. Complete destruction of adsorbent particles due to acoustic cavitation is observed with particles of low fracture loading and low Young's modulus. No or only little destruction is observed with particles which inhibit both sufficient strength and deformation properties. On the basis of these findings it is concluded that resin particles with optimum resistance to ultrasound show both a sufficient fracture load as well as high mechanical flexibility. Copyright © 2002 John Wiley & Sons, Ltd.
ISSN:1042-7147
1099-1581
DOI:10.1002/pat.203