In the present work, composites of poly(methyl methacrylate)/titanium oxide nanoparticles (100/0, 97.5/2.5, 95/5, 92.5/7.5, 90/10 and 0/100 wt/wt%) were prepared to be used as bioequivalent materials according to their importance broad practical and medical applications. Thermal properties as well as X-ray diffraction analyses were employed to characterize the structure properties of such composite. The obtained results showed variations in the glass transition temperature (T g), the melting temperature (T m), shape and area of thermal peaks which were attributed to the different degrees of crystallinity and the existence of interactions between PMMA and TiO 2 nanoparticle molecules. The XRD patterns showed sharpening of peaks at different concentrations of nano-TiO 2 powder with PMMA. This indicated changes in the crystallinity/amorphosity ratio, and also suggested that the miscibility between the amorphous components of homopolymers PMMA and nano-TiO 2 powder is possible. The results showed that nano-TiO 2 powder mix with PMMA can improve the thermal stability of the homo-polymer under investigation, leading to interesting technological applications.
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