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The effect of deuteration on the ultrasonic properties of poly(methyl methacrylate)

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Abstract

Room-temperature ultrasonic compressional wave velocity and attenuation measurements have been carried out on commercial poly-methyl methacrylate (PMMA) and fully deuterated PMMA. Deuteration was found to reduce the velocity by 4.4 ± 1.2% which can be completely accounted for by the density change of 8.0%, assuming no changes in atomic force constants or molar volume. The attenuation was 17% higher in the deuterated sample. Making reasonable assumptions about the distribution function for the relaxation times of molecular groupings moving in two-well potentials, the attenuation increase is attributed to a reduction in the attempt frequency for barrier hopping of main chain and/or ester methyl groups.

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Authors and Affiliations

  1. Department of Physics, Brunel University, Kingston Lane, UB8 3PH, Uxbridge, Middlesex, UK

    B. Bridge, B. Gabrys & S. B. Joshi

  2. Department of Chemical Engineering, Imperial College, SW7 2BY, London, UK

    J. S. Higgins

Authors
  1. B. Bridge
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  2. B. Gabrys
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  3. S. B. Joshi
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  4. J. S. Higgins
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Bridge, B., Gabrys, B., Joshi, S.B. et al. The effect of deuteration on the ultrasonic properties of poly(methyl methacrylate). J Mater Sci 24, 3295–3299 (1989). https://doi.org/10.1007/BF01139056

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  • DOI: https://doi.org/10.1007/BF01139056

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