Untitled

Blaine, Roger L.; Hahn, B. K.

doi:10.1023/a:1010171315715

Cited by 104 publications

(48 citation statements)

References 4 publications

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“…In this course of progress, temperature modulation was applied to other techniques, and temperature-modulated TG (tm-TG) was proposed [11]. The sinusoidal temperature modulation causes oscillation of the rate constant and hence oscillation of the rate of mass change, as illustrated in Fig.…”

Section: Temperature Modulationmentioning

confidence: 99%

“…One of the examples of tm-TG curves is reproduced in Fig. 12 [11]. In both ways of tm-TG the amplitude of the oscillating rate of mass loss is compared with the amplitude of temperature modulation, and the activation energy is estimated in real time by this comparison.…”

Section: Temperature Modulationmentioning

confidence: 99%

“…• isothermal run, including stepwise heating and cooling • constant rate heating (or cooling) • temperature control for sample thermal history [5] • sample-controlled thermal analysis (SCTA or controlled-rate thermal analysis: CRTA) [6] • temperature jump [7] and rate jump [8] • temperature modulation [9][10][11] • repeated temperature scanning [12] The last two are different in data processing. In the temperature-modulated TG oscillating change of the physical property we observe is analyzed by Fourier analysis, and the amplitude of the oscillating rate of conversion is compared with that of temperature modulation [11], while equivalent isothermal curves of the conversion versus its rate are extracted in the latter.…”

Section: Introductionmentioning

confidence: 99%

“…In the temperature-modulated TG oscillating change of the physical property we observe is analyzed by Fourier analysis, and the amplitude of the oscillating rate of conversion is compared with that of temperature modulation [11], while equivalent isothermal curves of the conversion versus its rate are extracted in the latter. Details will be described below.…”

Section: Introductionmentioning

confidence: 99%

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Temperature control modes in thermal analysis

Ozawa

2000

Pure and Applied Chemistry

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Now we can use several temperature control modes, for example, isothermal run including stepwise heating and cooling, constant rate heating (or cooling), temperature control for sample thermal history, sample-controlled thermal analysis (SCTA or controlled-rate thermal analysis, CRTA), temperature jump, rate jump, temperature modulation, and repeated temperature scanning. Their advantages and drawbacks are reviewed with some illustrative examples, especially for application to kinetic analysis. The combined use of these varieties of temperature control mode is recommended by showing examples. Temperature modulation and repeated temperature scanning are discussed in comparison with temperaturemodulated differential scanning calorimetry (DSC), and common and analogous points are elucidated. In relation to this, the possibility of the imaginary part of the overall reaction rate constant in complex reactions is postulated. Finally, these modes are classified and tabulated from two viewpoints, and other possible modes are shown.

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Section: Temperature Modulationmentioning

confidence: 99%

Section: Temperature Modulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Temperature control modes in thermal analysis

Ozawa

2000

Pure and Applied Chemistry

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“…A range of industrial furnace conditions, from non-oxidising through to highly oxidising, have been simulated by performing the TG tests under argon, 5% hydrogen-95% nitrogen gas mixture, nitrogen and oxygen. The activation energies of oil removal, E a , under each of these gas atmospheres have been determined by both modulated thermogravimetry (MTG) [19,20] and the Flynn-Wall-Ozawa [21][22][23] method to establish an optimal furnace atmosphere for rolling oil removal.…”

Section: The Effect Of Gas Environment On Rolling Oil Removal From Comentioning

confidence: 99%

The effect of gas environment on rolling oil removal from cold-rolled steel as studied by TG

Pillar

Ginic‐Markovic

Clarke

et al. 2005

J Therm Anal Calorim

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This study investigates mechanisms of cold rolling oil removal from the surface of low-carbon steel. The removal process has been probed using thermogravimetric analysis techniques. A range of furnace atmospheres, from non-oxidising through to highly oxidising, have been used to simulate the oil removal conditions in the industrial process. The activation energies of oil removal under each gas atmosphere have been determined by MTG and the Flynn-Wall-Ozawa method. The results show that a reducing atmosphere is the optimal environment for effective oil removal. Steel-oil surface interactions have also been investigated to show that the steel substrate catalyses oil removal.

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Thermogravimetry of Polymers

Price

Hourston

Dumont³

2000

Encyclopedia of Analytical Chemistry

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Thermogravimetry (TG) is the study of the relationship between a sample's mass and its temperature. It can be used to study any physical (such as evaporation) or chemical process (such as thermal degradation) that causes a material to lose volatile gases. Polymers have different thermal stabilities and thus the qualitative “fingerprint” afforded by TG in terms of temperature range, extent and kinetics of decomposition provides a rapid means to distinguish one polymer from another using only milligram quantities of material. Experiments are most commonly carried out under conditions where the temperature is increased in a linear fashion with time or the sample is held isothermally at an elevated temperature, although more sophisticated temperature profiles are occasionally used for compositional and kinetic analysis. Processes which do not result in a change in sample mass are not detected by TG. Therefore simultaneous measurements by differential scanning calorimetry (DSC) are useful. Volatile decomposition products may be detected and identified (e.g. by infrared (IR) spectrometry or mass spectrometry (MS)) in order to elucidate the mechanism of mass changes. TG is used for quantitative compositional analysis of polymers, lifetime prediction and kinetic studies, making the technique invaluable in all stages of polymer development, fabrication and component testing.

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Untitled

Cited by 104 publications

References 4 publications

Temperature control modes in thermal analysis

Temperature control modes in thermal analysis

The effect of gas environment on rolling oil removal from cold-rolled steel as studied by TG

Thermogravimetry of Polymers

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