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

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