Assessment of compatibility of dextran/PEMA blends by thermal, topologic and viscoelastic analysis.

In this study, the compatibility of polymer blends of dextran (DEX) and poly(ethylene-alt-maleic anhydride) (PEMA) was evaluated with their enhanced thermal and dynamic mechanical properties as well as structural and topological properties. Blends were prepared in various ratios via solution casting method. The effects of composition and dispersion on interactions, thermal, viscoelastic and topological properties of the blends were investigated using thermogravimetric analysis (TGA), dynamic mechanical analysis (DMA), atomic force microscopy (AFM) and attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy and X-ray diffraction (XRD) analysis.

Preparation, characterization and dynamical mechanical properties of dextran-coated iron oxide nanoparticles (DIONPs).

Dextran-coated iron oxide nanoparticles (DIONPs) with appropriate surface chemistry exhibit many interesting properties that can be exploited in a variety of biomedical applications such as magnetic resonance imaging (MRI) contrast enhancement, tissue repair, hyperthermia, drug delivery and in cell separation. This paper reports the experimental detail for preparation, characterization and investigation of thermal and dynamical mechanical characteristics of the dextran-coated FeO magnetic nanoparticles. In our work, DIONPs were prepared in a 1:2 ratio of Fe(II) and Fe(III) salt in the HCl solution with NaOH at given temperature.