Skip to main content
SpringerLink
Log in

Adsorption behavior of polymers having phosphoric acid group on γ-Fe2O3 and magnetic characteristics in magnetic coatings

  • Polymer Science
  • Published:
Colloid and Polymer Science Aims and scope Submit manuscript

Abstract

Polymers having phosphoric acid groups were prepared as a model binder for magnetic coatings, and the correlation among the adsorption behavior of the polymers ontoγ-Fe2O3 particles and the dispersibility, the orientation, and the packing density ofγ-Fe2O3 particles in the magnetic coatings was investigated.

PMMA homopolymer molecules hardly adsorbed onγ-Fe2O3, and the interfacial tension at a water/polymer solution (toluene) interface (γ W/T) was scarcely changed compared with a water/toluene interface. Increasing with the content of polymeric phosphoric acid group, the adsorbance of polymer increased and the interfacial tension (γ W/T) decreased. When the content of polymeric phosphoric acid groups was over 0.4 mol%, the adsorbance of polymer and interfacial tension (γ W/T ) remained constant. When these polymers were used as a binder for magnetic tapes, the dispersibility ofγ-Fe2O3 in the magnetic coatings was improved, increasing with the content of polymeric phosphoric acid group; however, when the content of phosphoric acid group was over 0.2 mol%, its dispersibility decreased abruptly.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. Howard JK (1986) J Vac Sci Technol A, 1:1

    Google Scholar 

  2. Ouchi K, Iwasaki S (1980) IEEE Trans Magn MAG-18:1110

    Google Scholar 

  3. Iwasaki S (1980) IEEE Trans Magn MAG-16:71

    Google Scholar 

  4. Sumiya K, Matsumoto T, Watatani S, Hayama F (1979) J Phys Chem Solids 40:1097

    Google Scholar 

  5. Kishimoto M (1979) IEEE Trans Magn MAG-15:906

    Google Scholar 

  6. Oppegard AL, Darnell FJ, Miller HC (1961) J Appl Phys 32:184S

    Google Scholar 

  7. Van der Giessen AA (1973) IEEE Trans Magn MAG-9:191

    Google Scholar 

  8. Uehori T, Hosaka A, Tokuoka Y, Izumi T, Imaoka Y (1978) IEEE Trans Magn MAG-14:852

    Google Scholar 

  9. Sumiya K, Nakamae K, Matsumoto T, Watatani S, Hayama F (1980) Ferrites:Proc 3rd Int Conf Kyoto Japan 566

  10. Nakamae K, Sumiya K, Matsumoto T (1984) Progress in Organic Coatings 12:143

    Google Scholar 

  11. Nakamae K, Sumiya K, Taii T, Matsumoto T (1984) J Polym Sci Polym Sympo 71:109

    Google Scholar 

  12. Watatani S, Sumiya K, Hayama F, Naone H, Matsumoto T (1978) Kobunshi Ronbunshu 35:565

    Google Scholar 

  13. Nakamae K, Tanigawa S, Nakano K, Matsumoto T (1987) 40th symposium of colloid and interfacial chemistry, Kyoto:250

  14. Sumiya K, Matsumoto T (1985) Shikizai 58:211

    Google Scholar 

Download references

Author information

Author notes

  1. K. Nakamae

    Present address: Department of Industrial Chemistry, Faculty of Engineering, Kobe University, Rokkodai, Nada, Kobe, Japan

Authors and Affiliations

  1. Department of Industrial Chemistry, Faculty of Engineering, Kobe University, Rokkodai, Nada, Kobe, Japan

    S. Tanigawa, K. Sumiya & T. Matsumoto

Authors
  1. K. Nakamae
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. S. Tanigawa
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. K. Sumiya
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. T. Matsumoto
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

Studies on Recording Magnetic Materials and Magnetic Composite. XVIII.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Nakamae, K., Tanigawa, S., Sumiya, K. et al. Adsorption behavior of polymers having phosphoric acid group on γ-Fe2O3 and magnetic characteristics in magnetic coatings. Colloid & Polymer Sci 266, 1014–1019 (1988). https://doi.org/10.1007/BF01428810

Download citation

  • Received:

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF01428810

Key words

Search

Navigation