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Abstract

The photostabilization،of poly vinyl chloride (PVC)،films has been investigated byusingdiaminederivatives. The،(PVC) films were،contained 0.5% weight،of diaminederivatives which prepared by the method of casting. The photostabilizations،،of these compoundswere determined by monitoring the carbonyl index value with irradiation time. Also, the effect ،of concentrations of additives (range 0.1-0.5wt) on the rate of photostabilization،process was studied. Therefore we found،that a increasedphotostabilizationrates was increase with increasing،concentrations of compound. Besides,the influence،on film thickness،of photostabilization process was also studied;،and the results،showed that،the increasing of film thickness increase the rate of photostabilization. Also, the changes in the viscosity،of the averageemolecular weight, the degree،of deterioration (α) and the average number of chain scission (s) weretracked, it was concluded،that the random chain scission is always occurs inPVC film, also Quantum yield،of the chain،scission of،these compounds،was calculated. Several mechanisms،have been،suggested and according to experimentalresults obtained, these mechanisms are dependent on the structure،of،the additive, Among UV absorper،and radical،scavenger.

Keywords

UV absorber, Photostabilizer, Photochemistry, Poly vinyl chloride (PVC).

Article Type

Article

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