There is no universal super-material in the universe, but there are compounds that can have more than one characteristic that make it unconventional, and one of these is discovered in this study, which is Oxydtron (nano cement). Oxydtron has proven excellent efficiency as a flame retardant and surprisingly also showed excellent heat stabilizing effect. Tests carried out were limiting oxygen index, static heat stability, congo-red, differential scanning calorimetry, dehydrochlorination, capillary rheometry analysis, dynamic mechanical analysis, and color change measurement.
These thermal tests proved the ability of Oxydtron to improve the properties of poly(vinyl chloride) at high temperatures reducing the risks associated with the combustion of plasticized poly(vinyl chloride) by increasing its thermal stability, flame retardation, and rate of degradation was effectively decreased. These tests has been shown that Oxydtron is not only a material used to improve the properties of concrete; but also a material that has shown a significant indication in the stabilization process of plasticized poly(vinyl chloride).
As well, the structural changes in the poly(vinyl chloride) layer located directly under the flame zone (heat affected zone-HAZ), which is exposed to high temperatures without burning, have been checked by scanning electron microscopy (SEM) and FLIR analysis. Images obtained from SEM and FLIR analysis for the heat affected zone of limiting oxygen index samples showed a significant decrease in the chlorine content in the poly(vinyl chloride) structure accompanied by considerable stability of the carbon content when compared to the untested samples images. But after adding Oxydtron, the chlorine percentage was maintained at acceptable levels. Also, the effect of the processing method on poly(vinyl chloride)'s properties has been studied. The results obtained from the L.O.I test showed that the extrusion method was better than the rolling method for L.O.I. This behavior because the heat will be distributed uniformly in the screw-extrusion process, which reduces thermal stresses in the final product.
علي إبراهيم الموسوي | Ali I.Al-Mosawi | 11759