TITLE:
Study the Influence of UV-Irradiation on the Photo Stability of Pure and Plasticized Poly (4-Vinyl Biphenyl) in Solid Films
AUTHORS:
Khalid Essa Al Ani, Afrah Essa Ramadhan, Suha Khanfar
KEYWORDS:
Excimer Fluorescence, Photodegradation Kinetics, Phthalate Plasticizers, Poly (4-Vinyl Biphenyl), UV-Irradiation
JOURNAL NAME:
Materials Sciences and Applications,
Vol.8 No.13,
December
14,
2017
ABSTRACT: The effect of UV irradiation and blending with
phthalate and terephthalate plasticizers on the photo-stability of Poly (4-vinyl biphenyl) was studied at different intervals of irradiation
time and in presence of air. The increase in irradiation time on the
photodegradation of polymer thin films caused a change in the intensity and
shape of the fluorescence band. It has been found that the stability of the
polymer decreases with the increase of irradiation time, and to increases with
the increase of the amount of added phthalate and terephthalate plasticizers,
which is evidence of polymer photodegradation. The FT-IR spectra of
irradiated 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
degradation of the irradiated polymer. The increase in the intensity of
absorption of carbonyl and hydroxyl region, indicates a possible
photogegradation of polymeric chains and the formation of alcohols, aliphatic
ketones and to the increase in the number of (C=C) that resulted from hydrogen
abstraction during chains-scission.