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Thermogravimetry

About: Thermogravimetry is a(n) research topic. Over the lifetime, 12757 publication(s) have been published within this topic receiving 264453 citation(s). The topic is also known as: Thermogravimetric Analysis.

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Papers
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Journal ArticleDOI
Henry L. Friedman1Institutions (1)
Abstract: A technique was devised for obtaining rate laws and kinetic parameters which describe the thermal degradation of plastics from TGA data. The method is based on the inter-comparison of experiments which were performed at different linear rates of heating. By this method it is possible to determine the activation energy of certain professes without knowing the form of the kinetic equation. This technique was applied to fiberglass-reinforced CTL 91-LD phenolic resin, where the rate law - (1/we)(dw/dt) = 1018e−55,000/RT [(w - wf)/w0,]5, nr.−1, was found to apply to a major part of the degradation. The equation was successfully tested by several techniques, including a comparison with constant temperature data that were available in the literature. The activation energy was thought to be correct within 10 kcal.

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2,571 citations


Journal ArticleDOI
Jiaguo Yu1, Huo-Gen Yu1, Bei Cheng1, Xiujian Zhao1  +2 moreInstitutions (1)
Abstract: TiO2 thin films were prepared on fused quartz by the liquid-phase deposition (LPD) method from a (NH4)2TiF6 aqueous solution upon addition of boric acid (H3BO3) and calcined at various temperatures. The as-prepared films were characterized with thermogravimetry (TG), Fourier transform infrared spectra (FTIR), X-ray diffraction (XRD), UV−Visible spectrophotometry (UV−Vis), scanning electron microscopy (SEM), photoluminescence spectra (PL), and X-ray photoelectron spectroscopy (XPS), respectively. The photocatalytic activity of the samples was evaluated by photocatalytic decolorization of methyl orange aqueous solution. It was found that the as-prepared TiO2 thin films contained not only Ti and O elements, but also a small amount of F, N, and Si elements. The F and N came from the precursor solution, and the amount of F decreased with increasing calcination temperature. Two sources of Si were identified. One was from the SiF62- ions, which were formed by a reaction between the treatment solution and quartz ...

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1,051 citations


Book
01 Jan 1964-
Abstract: Contents include: Thermogravimetry. Thermobalances. Applications of thermogravimetry. Differential thermal analysis and differential scanning calorimetry. Evolved gas detection and evolved gas analysis. Spectroscopic, photometric, and optical thermal techniques. Miscellaneous thermal analysis techniques. This revised edition necessitated by the phenomenal growth of the field during the past decade contains 90% new material. Emphasis is on tech niques and applications of thermal analysis. Author now with University of Houston. -- AATA

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951 citations


Journal ArticleDOI
Abstract: The thermal stability of organically modified layered silicate (OLS) plays a key role in the synthesis and processing of polymer-layered silicate (PLS) nanocomposites. The nonoxidative thermal degradation of montmorillonite and alkyl quaternary ammonium-modified montmorillonite were examined using conventional and high-resolution TGA combined with Fourier transform infrared spectroscopy and mass spectrometry (TG−FTIR−MS) and pyrolysis/GC−MS. The onset temperature of decomposition of these OLSs was approximately 155 °C via TGA and 180 °C via TGA−MS, where TGA−MS enables the differentiation of water desorbtion from true organic decomposition. Analysis of products (GC−MS) indicates that the initial degradation of the surfactant in the OLS follows a Hoffmann elimination reaction and that the architecture (trimethyl or dimethyl), chain length, surfactant mixture, exchanged ratio, or preconditioning (washing) does not alter the initial onset temperatures. Catalytic sites on the aluminosilicate layer reduce ther...

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939 citations


Journal ArticleDOI
14 Aug 2000-Thermochimica Acta
Abstract: We investigated the thermal properties of several imidazolium salts using DSC and TGA/SDTA data. Many of these salts are liquids at sub-ambient temperatures. These ionic liquids form glasses at low temperatures and have minimal vapor pressure up to their thermal decomposition temperature (>400°C). Thermal decomposition is endothermic with the inorganic anions and exothermic with the organic anions investigated. Halide anions drastically reduce the thermal stability of these salts (<300°C). We have observed that aluminium catalyzes the decomposition of the salts containing the inorganic fluoride anions. The imidazolium cations are thermally more stable than the tetraalkyl ammonium cations.

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915 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202217
2021333
2020343
2019387
2018396
2017424

Top Attributes

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Topic's top 5 most impactful authors

Massao Ionashiro

113 papers, 1.2K citations

Ray L. Frost

42 papers, 1.7K citations

Flávio Junior Caires

34 papers, 302 citations

Antonio S. Araujo

28 papers, 642 citations

Gilbert Bannach

19 papers, 250 citations