Thermo and Photo-Oxidation Degradation of Poly (4-Vinylbiphenyl) in Solid Films

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5th International Scientific Conference on Applied Sciences and Engineering 29-30 December, 2015 Flora Grand Hotel, Dubai, United Arab Emirates

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Abstract of Applied Sciences and Engineering, 2015, Vol.5
DOI: 10.18488/journal.1001/2015.5/1001.5
5th
International Scientific Conference on Applied
Sciences and Engineering
29-30 December, 2015
Flora Grand Hotel, Dubai, United Arab Emirates
Conference Website: www.scihost.org
6
Paper ID: 48/15/ 5
th
ISCASE
Thermo and Photo-Oxidation Degradation of Poly (4-
Vinylbiphenyl) in Solid Films
Khalid Essa Al Ani1
--- Suha Khanfer2
1
Department of Pharmaceutical Sciences, Faculty of Pharmacy, Jadara University, Irbid, Jordan
2
Department of Chemistry, Faculty of Science, Hashemite University, Zarka, Jordan
Abstract
The photo and thermal stability of thin films of poly (4-vinylbiphenyl) were studied by
irradiation with UV- light, in presence of air at room temperature and solid films were
heated in vacuum oven, at different temperatures. Irradiated and thermally heated
samples were investigated with absorption, fluorescence and FT-IR spectroscopic
methods. The influence of phthalate and terephthalate plasticizers on photo-oxidative
and thermo-oxidative degradation processes was also investigated. It has been found
that the stability of the polymer decreases with the increase of the irradiation and
heated times, and increases by the increase of the amount of added plasticizers.
Irradiated and thermally heated pure and blended polymer solid films resulted in the
appearance of new fluorescence bands at longer wavelength, as well as, quenching
and change in the shape of the fluorescence spectra. The FT-IR spectra of irradiated
and heated films of pure and blended polymer with phthalate and terephthalate
plasticizers showed a decrease in some absorption bands and increase in the other
bands, this is also another factor for the occurrence of photo and thermal degradation
of the irradiated and heated polymer. The UV-irradiation effects on stability of poly (4-
vinylbiphenyl), in dichloroethane, dichloromethane, tetrahydrofuran, and N, N-dimethyl
formamide solutions were studied in the presence of dissolved air by fluorescence
spectroscopy. Fluorescence quenching and a change in the shape of the fluorescence
spectra were noticed, which indicate the occurrence of photodegradation of polymer
chains.
Keywords: Thermo, Photo-Oxidation

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