thermal analysis and ftir spectroscopy of a pmma bone cement having various solid to liquid phase ratio and nano-silica filler

Mixtures of bone cement comprising different quantities of solid phase (pmma, bpo, baso4), liquid phase (mma, n, n-dimethyl toluidine, hydroquinone) and nano-silica filler are prepared. the mixtures are injected into specific molds after mixing for 30 sec. the molds are then set in an oven for 24 hrs at 37 °c. the cured samples are analyzed by tga/dtg, dsc and ftir. tga/dtg results show that the samples with higher solid phase have higher mrdt and by increasing the filler content, mrdt increases. dsc of samples indicates that all of them are entirely amorphous. ftir approves the presence of sio2 nanoparticles in cured bone cement. oh group peaks are broad and very weak in the pmma spectrum; however, they are more intense and sharper in the pmma–sio2 spectrum due to more hydrophilicity of the nanocomposites.