Characterization the Thermal Degradation E Kinetic of Unsaturated Polyester and Polyester/Silica Nanoparticles Composites by TGA and DSC Analysis

Abstract

The development of polymer nanocomposites is rapidly emerging as a multidisciplinary research field with results that could broaden the applications of polymers to many different industries. The nanocomposites were prepared from unsaturated polyester (UPE) mixed with a different percentage (10, 20, and 30%) of silica nanoparticles. TGA and DSC curves were obtained from the thermal degradation computed by using Coast-Redfern technique. Kinetic and thermodynamic parameters were studied for all specimens were presented a good linear correlation coefficient close to unity using Minitab 16. Experimental work was showed that the degradation of composites that obtained from thermal gravimetric analysis was slower than the resin. Also, the decomposition under the oxidative environment was much faster than the inert environment. The enhancement of stability was attributed to silica content.

Filler Type and Particle Distribution Effect on Compact Properties of Polymer Composites

“…In contrary to Shimazaki et al, organic fillers used in that study caused higher thermostability [21]. It means that filler's structure influenced thermal stability that as organic-based fibrils decreased the thermal stability whereas minerals having inorganic chemical structure enabled higher thermostability [22][23][24][25]. This circumstance can be explained with the organic cellulose fillers enabled chain mobility of the polymer within the composite whereas inorganic fillers restricted chain mobility in the matrix on the long-range [26].…”

Improvement in the performance of two layered model pavement with treated coir geotextile at the interface

“…Whereas the second step of all treated coir geotextiles is a result of degradation of fiber and chain scission of the unsaturated polyester resin and bitumen emulsion. 42 It can be observed from Table 6 that the T max of all treated coir geotextiles is higher than untreated coir geotextiles. This is due to the strong bond between fiber and chemicals, indicating improved thermal stability of treated coir geotextiles.…”

“…Whereas the second step of all treated coir geotextiles is a result of degradation of fiber and chain scission of the unsaturated polyester resin and bitumen emulsion. 42…”