Abstract
A thermo-oxidative pre-treatment with chemical solutions is required in order to provide the adherence of inorganic semiconductor to the isotactic polypropylene (iPP) surface. A few thin films of iPP were treated with oxidizing solution at 90 °C. The crystalline properties were analyzed using XRD, and it had shown the presence of the α-monoclinic phases. The ATR-FTIR spectra had indicated that characteristic iPP peaks after thermo-oxidative chemical pre-treatment diminished sharply. Moreover, the new carbonyl groups (C = O) were observed, which signified oxidation. The UV–Vis spectra had showed a blue shift in the absorption edge, which corresponded to decrease in the optical band gap. The non-isothermal decomposition and crystallization kinetics of iPP films were studied and compared by means of thermogravimetric analysis and differential scanning calorimetric measurement. The values of the melting temperature T m and the crystallization temperature T c were found to be iPP surface structure and heating/cooling rate dependent. The activation energy of crystallization E c was determined.
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