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Rheological and dynamic mechanical properties of polymer-bonded magnets based on Sm2Co17 and polyamide-12

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Abstract

The rheological and dynamic mechanical properties of polymer-based composites of Sm2Co17 and polyamide-12 with different particle loadings, sizes, and surface treatments are reported. Sm2Co17 particles were surface-treated with three different silanes: 3-glycidoxy(propyl)trimethoxysilane, 3-amino(propyl)trimethoxysilane (APTMS), and methyltrimethoxysilane (MTMS). It was shown, for the composites with untreated particles, that the viscosity and storage modulus increased with increasing filler content (0–60 vol%) and decreasing filler particle size. In addition, the glass transition temperature increased significantly and the damping decreased with increasing filler content. Of the silanes, the MTMS, which yielded only a thin surface layer, had in general the least effect on the rheological properties of the composite. The composite containing the APTMS-coated filler showed the highest storage modulus. The results give new insights on how to prepare polymer-bonded magnets with optimal process conditions (rheology) and dynamic mechanical properties, by varying the amount of particles, their size, and surface treatment.

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Authors and Affiliations

  1. School of Chemical Science and Engineering, Fibre and Polymer Technology, KTH Royal Institute of Technology, 100 44, Stockholm, Sweden

    M. I. Qadeer, U. W. Gedde & M. S. Hedenqvist

  2. School of Industrial Engineering and Management, Materials Science and Engineering, KTH Royal Institute of Technology, 100 44, Stockholm, Sweden

    M. I. Qadeer & S. J. Savage

  3. Division of Sensor and EW Systems, Swedish Defence Research Agency (FOI), 581 11, Linköping, Sweden

    S. J. Savage

Authors
  1. M. I. Qadeer
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  2. S. J. Savage
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  3. U. W. Gedde
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  4. M. S. Hedenqvist
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Correspondence to M. S. Hedenqvist.

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Qadeer, M.I., Savage, S.J., Gedde, U.W. et al. Rheological and dynamic mechanical properties of polymer-bonded magnets based on Sm2Co17 and polyamide-12. J Mater Sci 49, 7529–7538 (2014). https://doi.org/10.1007/s10853-014-8460-4

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  • DOI: https://doi.org/10.1007/s10853-014-8460-4

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