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Preparation and characterization of calcium phosphate-poly(vinyl phosphonic acid) composites

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Abstract

Composites of calcium phosphates and the calcium salt of a biomedical polymer were prepared in situ by hot-pressing particulate mixtures of poly (vinyl phosphonic acid) (PVPA) and tetracalcium phosphate Ca4(PO4)2O, or TetCP) at different temperatures, pressures, and time periods. The objective was to establish whether PVPA could react with TetCP (Ca/P ratio of 2.0) to form a calcium salt, and thereby decrease the available Ca/P ratio 1.67 to facilitate hydroxyapatite (Ca10(PO4)6(OH)2 or HAp) formation. The effects of varying the bulk composition, temperature (to 300 °C), pressure (to 690 MPa) and time (to 60 min) on the reaction between TetCP and PVPA were studied using X-ray diffraction, infra-red spectroscopy and scanning electron microscopy techniques. Results showed that the conversion of TetCP into HAp increased with compaction time as temperature and/or pressure were increased. Formation of anhydrous dicalcium phosphate (CaHPO4, or DCPA) was also observed. Complete conversion of TetCP to HAp was achieved in composites pressed at 250 °C and 415 MPa for 30 min. © 2001 Kluwer Academic Publishers

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References

  1. R. I. MARTIN and P. W. BROWN, Advances in Cement Research 5 (1993) 119.

    Google Scholar 

  2. Y. E. GREISH and P. W. BROWN, J. Mater. Res. 14(12) (1999) 4637–4642.

    Google Scholar 

  3. J. ELLIS and A. D. WILSON, J. Mater. Sci. Lett. 9 (1990) 1058.

    Google Scholar 

  4. Idem. Polym. Intl. 24 (1991) 221.

  5. J. ELLIS, M ANSTICE and A. D. WILSON, Clin. Mater. 7 (1991) 341.

    Google Scholar 

  6. A. D. WILSON and J. W. NICHOLSON, “Acid-Base Cements, Their Biomedical and Industrial Application”, (Cambridge University Press, 1993).

  7. J. H. BRAYBROOK and J. W. NICHOLSON, J. Mater. Chem. 3 (1993) 361.

    Google Scholar 

  8. R. F. SOGNNAES, J. H. SHAW and R. BOGOROGH, Am. J. Physiol. 180 (1955) 408.

    Google Scholar 

  9. M. ANBAR and E. P. FARLEY, J. Dent. Res. 33 (1974) 879.

    Google Scholar 

  10. M. ANBAR and G. A. ST JOHN, J. Dent. Res. 3 (1971) 778.

    Google Scholar 

  11. Y. E. GREISH and P. W. BROWN, Biomaterials submitted.

  12. M. B. THOAMS, R. H. DOREMUS, M. JARCHO and R. L. SALSBURY, J. Mater. Sci. 15 (1980) 891.

    Google Scholar 

  13. R. Z. LEGEROS, “Calcium Phosphates in Oral Biology and Medicine” edited by H. H. Myers (Monographs in Oral Science) (Karger, Basel, Switzerland, 1991) p. 170.

  14. A. J. BEGALA and U. P. STRAUSS, J. Phys. Chem. 76 (1972) 254.

    Google Scholar 

  15. P. W. BROWN, R. I. BROWN and K. S. TENHUISEN, Bioceramics: Materials and Applications II, 1996, p. 37.

  16. ELLIS, PhD Thesis, CNAA, Thames Polytechnic, (1989) London.

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  1. Intercollege Materials Research Laboratory, Pennsylvania State University, University Park, PA, 16802, USA

    Y. E. Greish & P. W. Brown

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  1. Y. E. Greish
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  2. P. W. Brown
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Greish, Y.E., Brown, P.W. Preparation and characterization of calcium phosphate-poly(vinyl phosphonic acid) composites. Journal of Materials Science: Materials in Medicine 12, 407–411 (2001). https://doi.org/10.1023/A:1011292819246

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