INDUCED PHOTO-DEGRADATION OF POLY (VINYL CHLORIDE) BY USING COBALT (II) CHLORIDE.

Abstract

: This research has been studied the photodegradation for poly( vinyl Chloride) when expose it to the light rays as it mixed with cobalt chloride duo (CoCl2.6H2O), polymer films had been prepared after mixing them with polymer solution by proportions grains ranged between (0.025% - 0.4%) and thickness was around (70 ± 5) microns in tetrahydrofuran (THF) as a solvent. Specimens were observing degradation of polymer films by using light intensity (1.5x10-8 ein.dm3s-1) at wavelength (356nm) at 40˚C at different radiation times. This was occurring in the absence and presence OF Cobalt (II) Chloride by using Fourier trans form infrared spectroscopy (FTIR). During the observation of the growth of the carbonyl Index (ICO) and hydroxyl (IOH), as well as using spectroscopy UV - visible ( UV), as Speed optical dissociation constant of polymeric additives, the results has showed that when the concentration of Cobalt (II) Chloride increased, the degradation of polymer films increased compare to free of salt polymer films. As this accompanied increased in the values of absorption of carbonyl and hydroxyl. It has been noticed that when this increase was a little bit higher when the concentration around 0.4% , which these results have an agreement with optical speed dissociation constant. Moreover, at the absence and presence ofh Moreover, at the absence and presence of concentration (0.05%) polymer film’s photodegradation was studied from salt added as observing the average viscosity of molecular weight, degree of degradation which found out Cobalt (II) Chloride decreased in the molecular weight as the rate chain increased. Finally, polymer films that had been prepared by morphology was studied in the absence and presence of the salt. This study was investigated to find out the amount of energy absorbed by those films and the possibility of cracks in the surface after exposing of those models to irradiation and time of 125 hours.