The TGA body weight alter curve is demonstrated in Figure one. The main fat reduction phase is the volatilization accompanied by An important decomposition phase. The spinoff of bodyweight transform curve in eco-friendly demonstrates a peak exactly where the height max is at 427.71 ˚C. The MS details is collected all over the whole TGA experiment. Ion currents and TGA mass decline are plotted like a operate of temperature (see Determine two). It is necessary to keep in mind that the goods of the TGA check are Generally decomposition products, and that is accurate in these experiments also. Hence, the aim is to be aware of the thermal degradation merchandise of nylon 66. TGA-MS repeatedly displays the decomposition off gases as being a purpose of your time and temperature. The degradation mechanism from the polymer molecules breaking in the C-N bond results in smaller sized polymer molecules While using the exact same device of bicarbonyl polymethylene fragments plus the fragments will break down into carbon dioxide, carbon monoxide, drinking water, and hydrocarbons [five].
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The GC/MS chromatogram is introduced in Determine 8 with six peaks indicating 6 feasible molecules. At the height max of each and every labeled peak, There's an linked mass spectrum and is plotted in Figure 9. The related MS spectrum offers a selected construction of one molecule. This provides far more exact library search results when compared to TGA-MS. Each MS spectrum in Figure nine is supplied with a greatest matched chemical framework within the library. The structures acquired with the GC/MS experiment concur extremely properly Together with the TGA-MS and TGA-FTIR outcomes with a further chemical separation within the given temperature.
The TGA-FTIR spectra of nylon sixty six were being saved to be a function of time in an array inside a Gram Schmidt file. Given that time and temperature might be simply correlated in a very TGA experiment, the TGA curve was analyzed to ascertain at what time the volatilization as well as degradation transpired. The Gram Schmidt file is plotted in eco-friendly in Determine six overlaying the TGA fat modify as well as the by-product curves.
TGA-FTIR spectra were recorded over the TGA examination as a operate of time and saved in an array given that the Gram Schmidt file at Every single data place
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The TGA-FTIR effects compliment the TGA-MS benefits. The two techniques supply helpful specifics of the constructions of your off-gasoline products and solutions with the nylon 66 thermal degradation process. FTIR can be extremely beneficial to identify the existence of particular chemical bonds and many useful groups in polymers. It can be broadly used for polymer characterization.