Photostabilization of polyvinyl chloride by some new thiadiazole derivatives
Open Access
- 30 September 2015
- journal article
- Published by European Journal of Chemistry in European Journal of Chemistry
- Vol. 6 (3), 242-247
- https://doi.org/10.5155/eurjchem.6.3.242-247.1165
Abstract
(5-Amino-1,3,4-thiadiazole-2-yl)phenol and it derivatives have been synthesized and characterized by spectral methods lik (FT-IR, UV-Vis, and 1H NMR) and elemental analysis beside the measurements of their physical properties. All the prepared compounds were used as photo stabilizer with polyvinyl chloride. The rate of photo degradation and photo stabilization for PVC films were monitored with irradiation time by measuring the carbonyl (Ico) index values. In addition, the effect of concentrations additives on the rate of photo degradation and photo stabilization process was also studied. We found that the rates were increased with increasing of additives concentrations. Besides, the effect of film thickness is studied and the results showed that the increasing of film thickness will decrease the rate of photo degradation as the following sequences: [5] > [2] > [1] > [3] > [4] > PVC. Degree of deterioration (α), average number of cuts per single polymer chain (s), were calculated for PVC films as a control and that which contains the additives. According to the experimental results obtained several mechanisms were suggested depending on the structure of the additive. Among then UV absorption and radical scavenger for photo stabilizer additive mechanisms were suggested.Keywords
This publication has 14 references indexed in Scilit:
- Evaluation of Schiff bases of 2,5-dimercapto-1,3,4-thiadiazole as photostabilizer for poly(methyl methacrylate)Journal of Saudi Chemical Society, 2012
- Improvement of the photostabilization of PVC films in the presence of 2N‐salicylidene‐5‐(substituted)‐1,3, 4‐thiadiazoleJournal of Applied Polymer Science, 2010
- Synthesis and antimicrobial studies of novel methylene bridged benzisoxazolyl imidazo[2,1-b][1,3,4]thiadiazole derivativesEuropean Journal of Medicinal Chemistry, 2009
- Synthesis and antimicrobial activity of new 1,2,4-triazole and 1,3,4-thiadiazole derivativesJournal of Enzyme Inhibition and Medicinal Chemistry, 2008
- Synthesis and antibacterial activity of N-(5-benzylthio-1,3,4-thiadiazol-2-yl) and N-(5-benzylsulfonyl-1,3,4-thiadiazol-2-yl)piperazinyl quinolone derivativesBioorganic & Medicinal Chemistry Letters, 2005
- Artificial accelerated weathering of poly(vinyl chloride) for outdoor applications: the evolution of the mechanical and molecular propertiesPolymer Degradation and Stability, 2003
- Effect of stabilizers in the thermal treatment of PVC—XIV. An i.r. spectroscopic study of the interaction of PVC and CD stearate during thermal degradationEuropean Polymer Journal, 1984
- Studies on modified benzotriazoles as photostabilizers for poly(vinyl chloride)European Polymer Journal, 1981
- The effects of thermal processing on PVC—IX. A polymer reactive u.v. stabilizer as a thermal stabilizer for PVCEuropean Polymer Journal, 1981
- Effect of stabilizers in the thermal treatment of PVC—VIII. An investigation of double bonds in PVC in the presence of Ba and Cd stearatesEuropean Polymer Journal, 1980