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Topic: Thermogravimetry

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	Thermogravimetry - Wikipedia, the free encyclopedia
		Thermogravimetry (also knows by acronym "TG" and obsolete names thermo-gravimetry, thermogravimmetry, thermography) is a branch of physical chemistry, materials research, and thermal analysis.
		It is based on continuous recording of mass changes of a sample of material, as a function of a combination of temperature with time, and additionally of pressure and gas composition.
		The conventional TG focuses on various aspects of ANALYSIS of materials; the other facet of thermogravimetry is studying SYNTHESIS, e.g.
	en.wikipedia.org /wiki/Thermogravimetry (482 words)

	Polymer Engineering and Science: Thermo-oxidative stability study of polypropylene composites by using cone calorimetry ... (Site not responding. Last check: 2007-10-20)
		Thermo-oxidative stability study of polypropylene composites by using cone calorimetry and thermogravimetry.
		The flammability of polypropylene (PP) and recycled PP composite systems was thoroughly investigated by using cone calorimetry and thermogravimetry techniques in order to quantify the effect of brominated and chlorinated fire-retardant systems.
		In this study, the efficiency of the fire-retarding systems was defined from the relation between the amount of fire retardants and the characteristic quantities in cone calorimetry (M-HRR, THR, and M-EHC) and the limited oxygen index.
	www.highbeam.com /library/doc0.asp?DOCID=1G1:92525275&refid=ip_encyclopedia_hf (192 words)

	A Thermogravimetric Analysis of Non-polymeric Pharmaceutical Plasticizers: Kinetic Analysis, Method Validation, and ...
		Rising temperature thermogravimetry coupled with nonlinear regression analysis has been shown to be an effective and rapid technique for accurately predicting the vapor pressure behavior and thermal stability evaluation of volatile compounds.
		Isothermal thermogravimetry was used as early as 1973 for determination of rates of volatilization of pesticides at ambient pressure.
		Using the double reference method as a validation tool, it has been demonstrated that thermogravimetry in combination with nonlinear regression can be employed for an accurate determination of unknown Antoine constants for sample compounds, even in cases where the reference and sample compounds are from different chemical classes.
	www.aapspharmsci.org /view.asp?art=ps040445 (5082 words)

	IBM Zurich Research Laboratory, Nanoscale science, cantilever sensors, thermogravimetry
		A piezoresistive cantilever is used for micromechanical thermogravimetry.
		Oscillating the cantilever by means of a piezo allows tracking the resonance frequency and therewith the change in mass of a small sample attached to the cantilever.
		With this setup, it is possible to do thermogravimetry experiments on nanogram samples with a resolution of picograms.
	www.zurich.ibm.com /st/nanoscience/thermogravimetry.html (112 words)

	JCE 2001 (78) 1090 [Aug] Distinguishing Calcium Carbonate from Calcium Sulfate Dihydrate by Instrumental Methods. A Set ...
		A project is proposed in which instrumental techniques are used to identify and characterize calcium sulfate and calcium carbonate or materials based on these compounds.
		The project involves thermogravimetry, IR and NIR vibrational spectroscopy, and X-ray fluorescence.
		Thermogravimetry measures the weight loss of the samples upon controlled heating and determines both water content and residue.
	jchemed.chem.wisc.edu /Journal/Issues/2001/Aug/abs1090.html (278 words)

	announcements.htm (Site not responding. Last check: 2007-10-20)
		A quantitative (TG) and qualitative characterization (FT-IR) of the evolved gases can be obtained with a single measurement on one and the same sample under identical conditions.
		Thermogravimetry (TG) is a well established method for the investigation of organic substances.
		Combined with thermogravimetry, IR-spectroscopy gives exact information about which substances are formed at which temperature (on-line analysis).
	www.ijvs.com /volume5/edition1/announcements.html (1235 words)

	Characterization of Ethylene-Propylene-Diene Monomer (EPDM) Roofing Membranes using Thermogravimetry and Dynamic ...
		The effect of heat-aging at 100 °C and 130 °C on three EPDM roofing materials was studied by thermogravimetry (TGA), dynamic mechanical thermal analysis (DMA), and tensile testing.
		Thermogravimetry (TGA) can be used to monitor changes in chemical composition of a material during weathering and/or exposure to elevated temperatures.
		EPDM roofing materials were characterized using thermogravimetry, dynamic mechanical analysis, and tensile testing.
	irc.nrc-cnrc.gc.ca /fulltext/nrcc36895 (3129 words)

	CHAPTER XV: GRAVIMETRIC METHODS
		With thermogravimetry, samples are heated and changes in sample mass are recorded.
		As always, the sample should be re-heated in accordance with #4 and re-weighed to achieve a constant weight (a drop of no more than 0.5 mg).
		Either the change of sample weight is determined (thermogravimetry), or the combustion gases are trapped and weighed (combustion analysis).
	www.ecs.umass.edu /cee/reckhow/courses/572/572bk15/572BK15.html (4570 words)

	Thermogravimetry of Polymers (Site not responding. Last check: 2007-10-20)
		Price, Duncan M.; Hourston, Douglas J.; Dumont, Fabrice; Thermogravimetry of Polymers.
		Thermogravimetry (TG) is the study of the relationship between a sample's mass and its temperature.
		TG can study any physical (such as evaporation) or chemical process (such as thermal degradation) that causes a material to lose volatile gases.
	www.sump4.com /publications/book001.html (219 words)

	QUT \| ePrints Archive - Thermal decomposition of peisleyite: a thermogravimetry and hot stage Raman spectroscopic study
		Thermal decomposition of peisleyite: a thermogravimetry and hot stage Raman spectroscopic study
		Thermal analysis shows the loss of water and hydroxyl units occurs in 3 distinct stages; at 36C, 105C and 162C. The high resolution thermogravimetry was complimented with hot stage Raman spectroscopy, which follows the dehydration of peisleyite.
		This dehydration can be followed by the decrease in intensity of the OH stretching vibrations which occur between 40002500cm-1 and by the shift in the sulphate and phosphate peaks which occur due to changes in the mineral structure.
	eprints.qut.edu.au /archive/00000820 (224 words)

	Effect of Bouyancy and Purge Gas Density
		Bouyancy changes with temperature are thought to be a major contributor to baseline drift in TGA experiments, but I don't recall seeing any detailed information on this subject.
		"Thermogravimetry and Thermomagnetometry", section 3.2.3, P.K. Gallagher, Handbook of Thermal Analysis and Calorimetry.
		Does anyone know of a treatment in the open literature on the effects of bouyancy and purge gas denisty on baseline in thermogravimetry experiments.
	www.egr.msu.edu /mailman-archives/thermal/2001-December.txt (4087 words)

	IngentaConnect The 'cave' mineral oxammite - a high resolution thermogravimetry ... (Site not responding. Last check: 2007-10-20)
		The 'cave' mineral oxammite – a high resolution thermogravimetry and Raman spectroscopic study
		The thermal decomposition of natural ammonium oxalate known as oxammite has been studied using a combination of high resolution thermogravimetry coupled to an evolved gas mass spectrometer and Raman spectroscopy coupled to a thermal stage.
		Three mass loss steps were found at 57, 175 and 188°C attributed to dehydration, ammonia evolution and carbon dioxide evolution respectively.
	www.ingentaconnect.com /content/schweiz/njmm/2004/00002004/00000001/art00003 (231 words)

	SKT 2003 Homepage
		Coupled thermal and evolved gas analysis has become one of the most widely accepted methods for material characterization.
		This applies in particular to the combination of FTIR and MS with thermogravimetry (TG).
		Application lectures from internationally recognized experts in many different research areas will be held.
	www.skt2000.com (208 words)

	Beamish--Thermogravimetry of coals
		Proximate analysis of New Zealand and Australian coals by thermogravimetry
		Abstract A technique has been developed at The University of Auckland for proximate analysis of coals by thermogravimetry using sample weights of <20 mg.
		Samples from three New Zealand coalfields and the Bowen Basin of Queensland, Australia, have been analysed.
	www.rsnz.org /publish/nzjgg/1994/34.php (189 words)

	Publications: Instrumentation (Site not responding. Last check: 2007-10-20)
		An interface and gas chromatograph are described that combine thermogravimetry with capillary gas chromatography-mass spectrometry.
		Examples of the use of this apparatus for identifying the volatile products produced during poly(vinyl butyral) thermal decomposition in the presence of gamma-alumina and catalytic cracking of poly(styrene) and poly(ethylene) are described.
		The apparatus permits repetitive temperature programmed capillary gas chromatographic analyses of thermogravimetric effluent containing more than 25 constituents in three minute intervals.
	faculty-staff.ou.edu /W/Robert.L.White-1/instr7.htm (104 words)

	WK736- Sulfated Ash of Organic Material by Thermogravimetry
		WK736 Sulfated Ash of Organic Material by Thermogravimetry
		Determination of sulfated ash (as known as residual-on-ignition using thermogravimetry pharmaceuitical and lubricants industry
		The title and scope are in draft form and are under development within this ASTM Committee.
	www.astm.org /DATABASE.CART/WORKITEMS/WK736.htm (46 words)

	All about explosives
		In thermogravimetry a sample is heated at a linear rate while it is being weighed.
		Since it is difficult to embed a thermocouple in a sample while it is being weighed, there must be a compromise between weighing accuracy and sensitivity and accuracy of temperature measurement.
		The test is not used for nonstandard propellants.
	mypyro.net /trgr (746 words)

	Upcoming Presentations (Site not responding. Last check: 2007-10-20)
		A fast GC technique has been developed to analyze volatile products produced from thermal decomposition of polymers.
		Thermogravimetry is a technique that quantifies mass changes during thermal processes.
		In many thermal processes volatile products are produced.
	faculty-staff.ou.edu /W/Robert.L.White-1/uppre1.htm (353 words)

	1997 Building Publications - Using Thermoanalytical Techniques to Characterize Roof Membrane Materials. (Site not responding. Last check: 2007-10-20)
		roofs; dynamic mechanical analysis; glass transition temperature; laboratory aging; outdoor exposure; roof membrane; thermal analysis; thermogravimetry; torsional pendulum analysis
		These techniques include classical methods, such as differential scanning calorimetry (DSC), differential thermal analysis (DTA), and thermogravimetry (TG), and modern methods, such as thermomechanical analysis (TMA), torison pendulum analysis (TPA), and dynamic mechanical analysis (DMA).
		This paper summarizes the work of the RILEM/CIB Joint Committee on Membrane Roofing Systems - Thermal Analysis Task Group on TG and DMA Testing of Roofing Membrane Materials.
	fire.nist.gov /bfrlpubs/build97/art108.html (202 words)

	Merriam-Webster Online
		thermogravimetry is one of more than 1,000,000 entries available at Merriam-WebsterUnabridged.com.
		For More Information on "thermogravimetry" go to Britannica.com
		Get the Top 10 Search Results for "thermogravimetry"
	www.m-w.com /cgi-bin/dictionary?book=Dictionary&va=thermogravimetry (55 words)

	sump4.com/publications/index.html
		Hinks, D.; Rafiq, M. I.; Montero, G. A.; Smith, B.; Price, D. A comparison of vapour pressure measurements of quinizarin and leuco-quinizarin via transpiration and thermogravimetry.
		Price, Duncan M.; Vapor pressure determination by thermogravimetry.
		Price, Duncan M.; Church, Stephen P.; Sambrook-Smith, Colin P.; Thermogravimetry - infrared evolved gas analysis of the anomalous thermal decomposition of thiophene fulgamic acid.
	www.sump4.com /publications (2075 words)

	UL \| A typical testing program for new plastic
		The basic testing program to achieve UL Recognition involves three identification tests: Infrared Spectroscopy (IR), Thermogravimetry (TGA) and Differential Scanning Calorimetry (DSC).
		In addition, since most end users benefit from Plastics being flame-rated, most UL-Recognized plastics products include Flame Classification.
		Best viewed using MSIE 5.0 or Netscape 4.0 or higher.
	www.ul.com /plastics/recognition.html (408 words)

	Highly Porous Metal Components from Melt Extracted fibres - Properties and Applications (Site not responding. Last check: 2007-10-20)
		TABLE 1: Composition of metal fibers (mass %)
		With this apparatus, continuous 100 hour thermogravimetry tests have been performed.
		Additionally, oxidation tests at 900 and 1000°C for 500 hours have been performed in a standard laboratory furnace.
	www.epw.ifam.fhg.de /english/kontakt/person/mpr/hpm_03.html (483 words)

	Delft Solids Solutions -Thermogravimetry (TGA)
		Thermogravimetry (TGA) measures the change in weight of a sample as it is heated, cooled or held at constant temperature.
		Our equipment can operate in the temperature range from
		The lower mass furnace allows fast heat-ups and cool-downs.
	www.solids-solutions.com /txt-tga.html (38 words)

	WK2579- Standard Test Method for Decomposition Kinetics by Thermogravimetry
		WK2579- Standard Test Method for Decomposition Kinetics by Thermogravimetry
		WK2579 Standard Test Method for Decomposition Kinetics by Thermogravimetry
		Arrhenius activation energy//pre-exponential factor; Decomposition kinetics; Kinetic parameters; Temperature-decomposition profile; Thermal analysis; Thermal decomposition; Thermogravimetry (TG); decomposition kinetics, by thermogravimetry, test; 71.040.40
	www.astm.org /DATABASE.CART/WORKITEMS/WK2579.htm (40 words)

	An Integrated Chemical, Thermal, and Microbiological Approach to Compost Stability Evaluation -- Mondini et al. 32 (6): ...
		, organic carbon • DH, degree of humification • DSC, differential scanning calorimetry • DTG, derivative thermogravimetry • FA, fulvic-like acids • FE, fumigation-extraction • HA, humic-like acids • HI, humification index • NH, nonhumic fraction • N
		Thermogravimetry and DSC were used to assess compost stability
		Differential scanning thermogravimetry (DSC), thermogravimetry (TG), and derivative thermogravimetry (DTG) thermograms of cotton separated from input materials and of samples C
	jeq.scijournals.org /cgi/content/full/32/6/2379 (3695 words)

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