Factors Affecting the Spectral Response in a TG/FT-IR Experiment

Marini, Amedeo; Berbenni, Vittorio; Capsoni, Doretta; Riccardi, R.; Zerlia, T.

doi:10.1366/0003702944027822

Cited by 19 publications

(7 citation statements)

References 2 publications

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“…During the TG/FTIR experiments, spectra were repeatedly collected as interferograms and then processed to build up a Gram-Schmidt reconstruction, each point of which corresponded to the total IR absorbance of the evolved components in the spectral range 40007500 cm -1 . Consequently, the Gram-Schmidt plot was formed by averaging the intensities of all FTIR peaks over the entire spectral range [11,12]. Thus, the total absorbance intensity of each mass loss is a function of the concentration of the evolved gases and their corresponding infrared extinction coefficients [12].…”

Section: Characterizationmentioning

confidence: 99%

The influence of carbon fillers on the thermal properties of polyurethane foam

Ciecierska

Jurczyk-Kowalska

Bazarnik

et al. 2015

J Therm Anal Calorim

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The aim of this work was to investigate the influence of different types of carbon filler on the thermal stability and flammability of rigid polyurethane foams. As a filler, multi-walled carbon nanotubes and graphite fakes were used. Scanning electron microscopy was used to observe the structure of foam and dispersion of nanofiller in polymer matrix. Thermal stability of these composites was determined by thermogravimetry analysis. Test was carried out under both nitrogen and air atmosphere. The degradation products were evaluated by thermogravimetry (TG) combined with infrared spectroscopy (TG-IR) measurements. The activation energy was measured by the Flynn-Wall-Ozawa method from the TG curves. Flammability tests like limiting oxygen index and smoke density were also measured. No significant changes in the thermal stability of the composites were observed. The activation energy of sample containing carbon filler increased. Based on TG-IR, one can notice that there were no differences in the emitted volatile products during thermal degradation. Carbon filler enhanced fire retardancy of polyurethane foam; however, graphite gives better results.

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Section: Characterizationmentioning

confidence: 99%

The influence of carbon fillers on the thermal properties of polyurethane foam

Ciecierska

Jurczyk-Kowalska

Bazarnik

et al. 2015

J Therm Anal Calorim

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“…the Gram-Schmidt plot is the result of averaging all FTIR peak intensities over the entire spectral range [28]. Thus, the total absorbance intensity of each mass loss is a function of the concentration of evolved gases and their corresponding infrared extinction coefficients.…”

Section: Ftir Measurementmentioning

confidence: 99%

Investigation of the thermal degradation of polyurea: The effect of ammonium polyphosphate and expandable graphite

Awad

Wilkie

2010

Polymer

138

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Abstract:Polyurea was compounded with ammonium polyphosphate and expandable graphite and the morphology was studied by atomic force microscopy. The thermal degradation of polyurea and polyurea compounded with the additives has been investigated using thermogravimetry coupled with Fourier Transform infrared spectroscopy and mass spectrometry. The study of the thermal degradation and the parameters affecting the thermal stability of PU is essential in order to effectively design flame retarded polyurea. In general, thermal decomposition of polyurea occurs in two steps assigned to the degradation of the hard segment and soft segment, respectively. Adding these additives accelerates the decomposition reaction of polyurea. However, NOT THE PUBLISHED VERSION; this is the author's final, peer-reviewed manuscript. The published version may be accessed by following the link in the citation at the bottom of the page.Polymer, Vol. 51, No. 11 (May 2010): pg. 2277-2285. DOI. This article is © Elsevier and permission has been granted for this version to appear in e-Publications@Marquette. Elsevier does not grant permission for this article to be further copied/distributed or hosted elsewhere without the express permission from Elsevier.2 it is clear that more char is formed. This char is thermally more stable than the carbonaceous structure obtained from neat PU. The intumescent shield traps the polymer fragments and limits the evolution of small flammable molecules that are able to feed the flame.

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“…the Gram-Schmidt plot is the result of averaging all FTIR peak intensities over the entire spectral range [21]. Thus, the total absorbance intensity of each weight loss is function of the concentration of evolved gases and their corresponding infrared extinction coefficients [22].…”

Section: Coupled Tga/ftir (Gram-schmidt Plots)mentioning

confidence: 99%