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Spatially resolved and integral NMR investigation of the aging process of carbon black filled natural rubber

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Summary

A complex aging regime takes place in the course of thermal aging of natural rubber. Depending on the kind and the content of the free crosslinker, the aging temperature, the duration of the aging period and the reactivity of the atmosphere (air or nitrogen) a different aging process can be observed also by NMR. The methods used are the common spin-echo-NMR (1H) and parameterselective NMR-imaging (1H). The decay of the echo-magnetization was evaluated on the basis of a modified single chain model (based on the tube model of de Gennes). The thermal aging course of a filled (carbon black) sample at 100°C shows a characteristic behaviour, beginning with a strong decrease of T2 followed by a weak increase through aging times of 10 to about 50 hours. At longer aging times the solid-like behaviour rises again.

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Authors and Affiliations

  1. Physics Department, University Halle, Friedemann-Back-Platz 6, D-06108, Halle, Germany

    Manfred Knörgen & Uwe Heuert

  2. Fraunhofer Institute for Biomedical Technology, Ensheimer Strasse 48, D-66386, St. Ingbert, Germany

    Peter Bargh

  3. Langental 18, D-66440, Blieskastel, Germany

    Winfried Kuhn

Authors
  1. Manfred Knörgen
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  2. Uwe Heuert
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  3. Horst Schneider
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  4. Peter Bargh
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  5. Winfried Kuhn
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Knörgen, M., Heuert, U., Schneider, H. et al. Spatially resolved and integral NMR investigation of the aging process of carbon black filled natural rubber. Polymer Bulletin 38, 101–108 (1997). https://doi.org/10.1007/s002890050025

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  • DOI: https://doi.org/10.1007/s002890050025

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