Hydrolysis of tetracalcium phosphate in the presence of a poly(alkenoic acid)

Y. E. Greish, P. W. Brown

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


Ca4(PO4)2O (TetCP) reacts with an acidic polyelectrolyte in the absence of a solvent to form a composite composed of Ca10(PO4)6(OH)2 (hydroxyapatite, or HAp) and the Ca salt of the polyelectrolyte. Mixtures of an acrylic copolymer and TetCP powders were hot-pressed, and the effects of temperature, pressure, and time on HAp formation were studied. Reaction starts when the copolymer is heated to above Tg. Initial carboxyl site neutralization liberates water, continued TetCP hydrolysis, liberates Ca2+ ions, which react with the copolymer forming its Ca salt. When 90% conversion to HAp was achieved, the composite had an average tensile strength of 51 MPa, a Vickers hardness of 145 kg/mm2 and a Tg to approximately 250 °C.

Original languageEnglish
Pages (from-to)4637-4642
Number of pages6
JournalJournal of Materials Research
Issue number12
Publication statusPublished - Dec 1999
Externally publishedYes

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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