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Advances in Materials Research
  Volume 4, Number 3, September 2015 , pages 145-164

Biophysical properties of PPF/HA nanocomposites reinforced with natural bone powder
Nagwa A. Kamel, Samia H. Mansour, Salwa L. Abd-El-Messieh, Wafaa A. Khalil and Kamal N. Abd-El Nour

    Biodegredable and injectable nanocomposites based on polypropylene fumarate (PPF) as unsaturated polyester were prepared .The investigated polyester was crosslinked with three different monomers namely N-vinyl pyrrolidone (NVP), methyl methacrylate (MMA) and a mixture of NVP and MMA (1:1 weight ratio) and was filled with 45 wt% of hydroxyapatite (HA) incorporated with different concentrations of chemically treated natural bone powder (NBP) (5, 10 and 15 wt%) in order to be used in treatment of orthopedics bone diseases and fractures. The nanocomposites immersed in the simulated body fluid (SBF) for 30 days, after the period of immersion in-vitro bioactivity of the nanocomposites was studied through Fourier transform infrared (FTIR), scanning electron microscope (SEM), energy dispersive X-ray (EDX) in addition to dielectric measurements. The degradation time of immersed samples and the change in the pH of the SBF were studied during the period of immersion.
Key Words
    biodegradable polyester; nanocomposites; bone powder; dielectric spectroscopy; biophysical properties
Nagwa A. Kamel, Salwa L. Abd-El-Messieh and Kamal N. Abd-El Nour: Microwave Physics and Dielectrics Department, National Research Centre, Dokki, Cairo, Egypt
Samia H. Mansour: Polymers and Pigments Department, National Research Centre, Dokki, Cairo, Egypt
Wafaa A. Khalil: Biophysics Department, Faculty of Science, Cairo University, Egypt

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