Effect of Fe, Co and Ni–laurates on the thermal stability of PVC

الملخص EN

Metal carboxylates (Fe, Co, Ni–laureates) were prepared and identified by elemental analysis and infrared spectroscopy.

The thermal stability of the PVC absence and presence of these metal carboxylates and their synergistic mixtures was studied by the TGA.

It was observed that the values of decomposition temperature and activation energy for PVC samples containing different stabilizer were found to be higher as compared to pure PVC.

Infrared spectroscopy was used to study the stabilizing effects for the metal carboxylates within the range 1500-1900 Cm-1.

The spectra were followed for films of stabilized PVC at 245 ºC in the air and in few cases in nitrogen.

IR spectroscopy was found to be suitable method to trace the consuming of the metal carboxylates during the degradation via antisymmetrical stretching vibration of the carboxylate group at 1540 Cm-1.

The thermal degradation was also studied for stabilized PVC by U.

V.

spectroscopy at 275 and 385 nm , and it was found that the metal carboxylates were decreased conjugated double bonds in the polymer . The general results indicate that these prepared metal carboxylates hinder the degradation and increase the thermal stability of PVC.