Composites of polymethyl methacrylate (PMMA) and polyvinyl chloride (PVC) polymer blend containing
different concentrations (610 wt.) of cobalt chloride (CoCl2) were prepared by casting techniques. The
changes of the structural, spectroscopic, optical and thermal parameters of the samples are studied using
different tools. FT-IR spectroscopy confirmed the complexation between the blends and Co+2-ions. The
decrease or increase of IR band intensity with some shifts of other bands suggests an interaction and
compatibility between PMMA/PVC blends with CoCl2 take place. The Ultra violet and visible (UV/Vis)
spectra indicated that the presence of band gap energy depends on increasing of CoCl2 contents. The
absorption intensity of the samples doped with CoCl2 becomes faint lower than the pure blend. The values
of energy gap for direct and indirect transition decreases with the increase of CoCl2 due to the presence
of charge transfer between PMMA/PVC and CoCl2. The thermogravimetric analysis (TGA) curves for
all the samples have the same behavior and more steps of decomposition were observed. The reduction of
mass loss for samples containing CoCl2 compared to the pure blend was observed and it was attributed to
crosslink formation between the blend and CoCl2.