Study of recyclable polymer automobile undercoatings containing PVC using TG/FTIR

Post, E.; Rahner, S.; Möhler, H.; Rager, Albrecht

doi:10.1016/0040-6031(94)02388-5

Cited by 28 publications

(14 citation statements)

References 7 publications

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“…To ensure the measurement of the actual sample temperature, a calibration of the temperature was performed using the Curie-point transition of standard metals, as suggested by the equipment manufacturer's recommendations. The output of the gas from the TGA was connected to a Bruker Tensor 27 FTIR spectrometer through a heated line, as described in the bibliography [39]. The balance adapter, the transfer line and the FTIR gas cell were maintained at 200ºC, in order to minimize…”

Section: Experimental Methodsmentioning

confidence: 99%

TGA/FTIR study of the MCM-41-catalytic pyrolysis of tobacco and tobacco–glycerol mixtures

et al. 2014

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In this work, the catalytic effect of MCM-41 on the qualitative composition of the gases evolved in the pyrolysis of glycerol, tobacco and tobacco-glycerol mixtures has been studied by TGA/FTIR. The results obtained reflect that the amount of volatile products obtained from tobacco or from tobacco containing mixtures is noticeably decreased if the catalyst is used as a tobacco additive. The addition of the catalyst also produces noticeable changes in the composition of the gases obtained at each temperature. Such changes are more significant in the case of the pyrolysis of the tobacco-glycerol-mixture than in the pyrolysis of tobacco. The evolution patterns for different types of compounds reveal that the catalyst contributes to a noticeable decrease of the yields of methane, CO, CO 2 and carbonylic compounds, which could be interesting from the point of view of the use of MCM-41 as a tobacco additive in order to reduce tobacco smoke toxicity.

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Section: Experimental Methodsmentioning

confidence: 99%

TGA/FTIR study of the MCM-41-catalytic pyrolysis of tobacco and tobacco–glycerol mixtures

et al. 2014

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“…For the second-stage thermal cracking, the region can be identified by the DTG but not the GSR curve; the latter curve shows the apparent delay and tailing effect. According to the analysis of the peaks in the FTIR absorption spectra for cracking PEEK in helium in comparison with standard spectra of phenol, CO, and CO 2 , the characteristic absorbency peak at 3038 cm Ϫ1 belongs to phenol, at 2350 cm Ϫ1 to CO 2 , and at 2120 cm Ϫ1 to CO. To calculate the changes of the evolved-gas profile, the absorbance values were carried out by integrating the peak area 14 of 3150 ϳ 2970 cm Ϫ1 for phenol, 2420 ϳ 2250 cm Ϫ1 for CO 2 , and 2250 ϳ 2000 cm Ϫ1 for CO. We compared the relative changes of these major cracking products with the cracking temperature as shown in Figure 3. There was a large amount of phenol released at 575°C in the first stage of thermal cracking, whereas CO 2 reached a maximum around 590°C and, subsequently, in the second stage at 800°C, showing another peak.…”

Section: Resultsmentioning

confidence: 99%

“…The evolved-gas compositions were identified with the standard Nicolet infrared spectra library. On the assumption that the Lambert-Beers law 14 was valid for these measurements, a semiquantitative characterization was carried out by integrating the peak area of the specific absorbency range of the major evolved gases under different conditions.…”

Section: Methodsmentioning

confidence: 99%

“…Chou 7 studied the ratio of HCl formation in different grades of coal. In addition, in the field of polymers, the thermal decomposition of poly(vinyl chloride) (PVC) additives, 8 the carbonization of polyacrylnitrile (PAN) fibers to NO 2 , CH 4 , and HCN, 9 the pyrolysis of ethylene-vinylacetate copolymer (EVA) polymers and coatings, 10 the pyrolysis of nitrocellulose and quantitative analysis of reaction products, 11 the gas compositions and thermogravimetric curves of polymers cracking under different environments of nitrogen and air, 12,13 and recovered plastics from automobiles have been used to evaluate the environmental impact, 14 whereas the thermal cracking of poly-(ether ether ketone) (PEEK) only has been studied by the TG/FTIR technique under a nitrogen atmosphere. 15 Because the cracking reactions of polymers depend very much on environmental conditions, the study of cracking reactions of polymers in air is essential for the evaluation of the thermal stability, oxidation, and safety of polymers.…”

Section: Introductionmentioning

confidence: 99%

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Thermal cracking characteristics of PEEK under different environments by the TG/FTIR technique

Perng

1999

J. Polym. Sci. A Polym. Chem.

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“…Coupling of Fourier transform-infrared spectroscopy (FT-IR) to thermal analyzers such as thermogravimetry instruments was established as one possibility for evolved gas analysis [1]. The FT-IR technique which detects the infrared absorbance of molecules due to their vibrational modes is a sensitive and very selective method especially for organic molecules.…”

Section: Introductionmentioning

confidence: 99%

A novel direct coupling of simultaneous thermal analysis (STA) and Fourier transform-infrared (FT-IR) spectroscopy

Strobel¹,

Neumann²,

Rager

et al. 2013

J Therm Anal Calorim

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Evolved gas analysis (EGA) from thermal analyzers such as thermogravimetry (TG) or simultaneous thermal analysis (STA) which refers to simultaneous TG-DSC is well established since it greatly enhances the value of TG or TG-DSC results. The sensitive and selective FT-IR technique is in particular useful for the analysis of organic molecules but also for infrared active permanent gases evolved during most decomposition processes. The coupling interface between thermal analyzers and FT-IR spectrometers usually consists of heated adapters and a flexible, heated transfer line. In this work, a novel direct coupling of an STA instrument and an FT-IR spectrometer without a transfer line is presented. A very small FT-IR spectrometer is directly mounted on top of the STA furnace leading to a compact and fully integrated STA-FT-IR coupling system. The possibilities and the value of simultaneous STA-FT-IR measurements are demonstrated for organic, biomass, and ceramic samples in the temperature range between room temperature and about 1,500°C. Various samples from the field of inorganics and organics-especially polymers-were furthermore measured showing the advantages of the direct STA-FT-IR coupling compared to state-of-the-art STA-FT-IR coupling using a heated transfer line: we found that the time delay caused by the volume of the transfer line itself is rather negligible whereas a significantly better correlation between gas detection and TG results was observed in case of some highly condensable decomposition gases. Aspects of quantification of evolved gases are furthermore discussed as well as the known nonlinearity of FT-IR detection at higher gas concentrations.

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Study of recyclable polymer automobile undercoatings containing PVC using TG/FTIR

Cited by 28 publications

References 7 publications

TGA/FTIR study of the MCM-41-catalytic pyrolysis of tobacco and tobacco–glycerol mixtures

TGA/FTIR study of the MCM-41-catalytic pyrolysis of tobacco and tobacco–glycerol mixtures

Thermal cracking characteristics of PEEK under different environments by the TG/FTIR technique

A novel direct coupling of simultaneous thermal analysis (STA) and Fourier transform-infrared (FT-IR) spectroscopy

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