title: Is there a chemical interaction between calcium phosphates and hydroxypropylmethylcellulose (HPMC) in organic/inorganic composites?
abstract: Solid composites of calcium phosphates and hydroxypropylmethylcellulose (HPMC) were prepared at temperatures of 121 degrees C. Three biologically relevant calcium phosphates were studied: CaHPO(4). 2H(2)O (DCPD), calcium deficient apatite (CDA), and biphasic calcium phosphate (BCP). Properties of the solid composites obtained were studied with FTIR, X-ray diffraction, and SEM techniques. Special attention was devoted to seeking a possible chemical interaction between calcium phosphates and HPMC. No interaction was found. Thus, HPMC was proven to have no influence on chemical properties of calcium phosphates.
authors.affiliation: Research Institute of Fertilizers, Kudrinskaja sq. 1 - 155, 123242 Moscow D-242, Russia.
authors.forename: S V
authors.initials: SV
authors.lastname: Dorozhkin
mesh_terms: D002130:Calcium Phosphates / Q000737:chemistry*; D065347:Hypromellose Derivatives; D008747:Methylcellulose / Q000031:analogs & derivatives* / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D017550:Spectroscopy, Fourier Transform Infrared; D013329:Structure-Activity Relationship; D014961:X-Ray Diffraction
chemical_list: D002130:Calcium Phosphates; D065347:Hypromellose Derivatives; D008747:Methylcellulose