A quick, direct method for the determination of activation energy from thermogravimetric data

Flynn, Joseph H.; Wall, Leo A.

doi:10.1002/pol.1966.110040504

Cited by 2,684 publications

(1,127 citation statements)

References 3 publications

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“…Heating rates of 0.1, 0.2, 0.5, 1, 2, 5, 10, 20 and 50 deg.min -1 were employed throughout. Kinetic data from the weight loss processes were analyzed by the Kissinger [2] and the OzawaFlynn Wall method [3,4] which have been shown to be [5,6] reliable techniques for evaluating degradation kinetics.…”

Section: Methodsologymentioning

confidence: 99%

Degradation behaviour of polymeric materials found in auto Shredder residue wastes

Day

Cooney

Klein

1993

Journal of Thermal Analysis

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The therrnogravimetry of a series of 50/50 mixtures of polypropylene, acrylonitrile/butadiene/styrene, polyvinyl chloride and polyurethane polymers have been studied as representative of the major polymeric materials found in automobile shredder residues. The weight loss behaviour of these polymeric mixes have been compared with the results calculated from the individual polymeric components. This comparison of the thermogravimetry curves and the calculated kinetic parameters indicates that interactions occur between the individual polymers when heated together. The extent of these interactions are dependent upon the polymeric mixtures being considered, but in most cases the changes in the degradation kinetic parameters were not large.

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Section: Methodsologymentioning

confidence: 99%

Degradation behaviour of polymeric materials found in auto Shredder residue wastes

Day

Cooney

Klein

1993

Journal of Thermal Analysis

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“…Rate constants were obtained with the use of Avrami model. According to this model under isothermal conditions, degree of reaction (transformation) is given by the equation [9][10][11]:…”

Section: Resultsmentioning

confidence: 99%

“…In order to determine activation energy as a function of degree of transformation, Flyn-Wall-Ozawa (FWO) model [11][12][13] was used. It is based on Doyle approximation for heterogeneous reactions:…”

Section: Resultsmentioning

confidence: 99%

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Effect of changing P/Ge and Mn/Fe ratios on the magnetocaloric effect and structural transition in the (Mn,Fe)2 (P,Ge) intermetallic compounds

Włodarczyk

Hawełek

Zackiewicz

et al. 2016

Materials Science-Poland

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The magnetocaloric effect in the Mn x Fe 2 − x P 1 − y Ge y intermetallic compounds with the amount of Mn in the range of x = 1.05 to 1.17 and amount of Ge in the range of y = 0.19 to 0.22 has been studied. It was found that a higher Ge/P ratio causes an increase in Curie temperature, magnetocaloric effect at low field (up to 1 T), activation energy of structural transition and a decrease in thermal hysteresis, as well as transition enthalpy. Contrary to this observation, higher Mn/Fe ratio causes a decrease in Curie temperature, slight decrease of magnetocaloric effect at low magnetic field, and an increase in thermal hysteresis. Simultaneous increase of both ratios may be very advantageous, as the thermal hysteresis can be lowered and magnetocaloric effect can be enhanced without changing the Curie temperature. Some hints about optimization of the composition for applications at low magnetic fields (0.5 T to 2 T) have been presented.

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“…In this region, the maximum rates of change in % mass occurred from 440 to 480 K, depending on heating rate. At these temperatures, HOS 2 decomposed and H became the radical responsible for propagation of the will therefore increase the available amount of free radical to initiate the radical chain [87][88][89][90][91][92][93][94][95].…”

Section: Sulfuric Systemmentioning

confidence: 99%

Effects of cross-linking methods for polyethylene-based carbon fibers: review

Kim¹,

Lee²,

An³

et al. 2015

Carbon letters

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In recent decades, there has been an increasing interest in the use of carbon fiber reinforced plastic (CFRP) in aerospace, renewable energy and other industries, due to its low weight and relatively good mechanical properties compared with traditional metals. However, due to the high cost of petroleum-based precursors and their associated processing costs, CF remains a specialty product and as such has been limited to use in high-end aerospace, sporting goods, automotive, and specialist industrial applications. The high cost of CF is a problem in various applications and the use of CFRP has been impeded by the high cost of CF in various applications. This paper presents an overview of research related to the fabrication of low cost CF using polyethylene (PE) control technology, and identifies areas requiring additional research and development. It critically reviews the results of cross-linked PE control technology studies, and the development of promising control technologies, including acid, peroxide, radiation and silane cross-linking methods.

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A quick, direct method for the determination of activation energy from thermogravimetric data

Cited by 2,684 publications

References 3 publications

Degradation behaviour of polymeric materials found in auto Shredder residue wastes

Degradation behaviour of polymeric materials found in auto Shredder residue wastes

Effect of changing P/Ge and Mn/Fe ratios on the magnetocaloric effect and structural transition in the (Mn,Fe)2 (P,Ge) intermetallic compounds

Effects of cross-linking methods for polyethylene-based carbon fibers: review

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