Meet Inspiring Speakers and Experts at our 3000+ Global Conference Series Events with over 1000+ Conferences, 1000+ Symposiums
and 1000+ Workshops on Medical, Pharma, Engineering, Science, Technology and Business.

Explore and learn more about Conference Series : World's leading Event Organizer

Back

Khlaid Al Ani


Khlaid Al Ani

Jadara University, Jordan

Biography

In recent years, much attention has been focused on research to prepare new generation of Poly (para-substituted styrene) and to study the irradiation, thermal and plasticization effects on stability of these new polymers. The effect of irradiation of plasticized Para-substituted polystyrene in solid films was studied at different intervals of irradiation times and at difference percentages of added phthalates and terephthalates plasticizers. The degradation process was followed by UV-VIS, Fluorescence and FT-IR Spectroscopic techniques, to determine the type and amount of degradation that occur during irradiation. The irradiated pure and plasticized polymers solid films showed an increase in the intensity of absorption band by the increase in irradiation time and increase in the amount of added plasticizers. On the other hand the intensity of fluorescence was decreased upon the increase in irradiation time and increase in the amount of blended phthalate and terephthalate plasticizers. The analysis of the FT-IR spectra of the irradiated and non-irradiated samplesIn 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. 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. Electrophilic substitution such as Cl and Br in the para position of the polymer backbone should be less stability towards UV-Irradiation, whereas, nucleophilic substitution such as (-H,-CH3,-OCH3,-OC2H5,-C6H5, α -CH3, α -OCH3, Phenyl and -C (CH3)4 should be higher stability towards irradiation of plasticization. Among the para-substituted polystyrene, Poly (4- fluoro styrene) should a very high stability towards irradiation and plasticization that all polymers used in these studies

Abstract

Abstract : Effects of UV-IRradiation and plasticization on stability of substituted polystyrene in solid films