Evaluation of Thermal Stabilization for Poly Vinyl Chloride Containing La,Sm and Nd-Decanoates | ||
| Journal of Basrah Researches (Sciences) | ||
| Article 1, Volume 38, Issue 3, September 2012, Pages 45-62 PDF (0 K) | ||
| Authors | ||
| Sindes Sh. Mushrif; Mouayed Y. Kadhum; Husham M. Talib and Faise J. Mohammed | ||
| Abstract | ||
| Three metal carboxylates were prepared namly,Lanthanum decanoate, Samarium decanoate and Neodymium decanoate, which were used as thermal stabilizers for PVC.These metal carboxylates were identified by elemental analysis,infrared and mass spectra.The mechanism of stabilization was studied by infrared (1500-1900 cm-1) and depended upon thin films.The changes in the absorbances intensity of COO–,C═C and C═O peaks were evaluated for different times at 200°C and resulting from the reaction of these metal carboxylates with hydrogen chloride liberated from PVC chains.It was found that infrared spectroscopy is a good technique to follow the consumption of the metal carboxylates during the thermal degradation.Ultraviolet spectra were used to study the thermal degradation of PVC at 275 and 385 nm and it was found that the metal carboxylates and their synergistic mixtures decreased conjugated double bonds in the polymer.The efficiency of these metal carboxylates in the stabilization of PVC was evaluated by thermogravimetric analysis during the calculating number of thermal parameters.The results indicated that metal carboxylates increased the thermal stability of PVC. | ||
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