Khlaid Al Ani
Jadara University, Jordan
Title: Irradiation and plasticization effect on stability of poly (4 – ethoxystyrene) in solid film and in solution
Biography
Biography: Khlaid Al Ani
Abstract
Irradiation of poly (4-ethoxystyrene) in solid films and at 265 nm at room temperature showed a gradual photo-degradation of polymeric chains. Degradation was accelerated by the presence of air and rise in temperature. The degradation process was followed by UV-VIS, fluorescence and FT-IR Spectroscopic techniques. The intensity of absorption spectra was increased by the increase in irradiation time in both solid films and in solution; on the other hand the intensity of fluorescence was decrease upon the increase in irradiation time and increase in the amount of blended phthalate and terephthalate plasticizers. Some kinetics work was applied to the results on fluorescence intensity of the excimeric emission to evaluate the quenching efficiencies and photo quenching rate constant by applying Al Ani Hawi equation. The analysis of the FT-IR spectra of the irradiated and non-irradiated samples, showed a noticeable formation of new bands and their intensity was found to increase with the increase in irradiation time and also with the increase in the amount of added plasticizer. In addition, the observed increase in the intensities of the carbonyl and hydroxyl absorption regions of the FT-IR spectra, providing evidence for the photo-degradation as well as photo-oxidation of polymeric chains