Journal ArticleDOI
Kinetics of thermal degradation of char-forming plastics from thermogravimetry. Application to a phenolic plastic
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TLDR
In this article, a technique was devised for obtaining rate laws and kinetic parameters which describe the thermal degradation of plastics from TGA data, based on the inter-comparison of experiments which were performed at different linear rates of heating.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.read more
Citations
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Thermal degradation of poly(methyl methacrylate) (PMMA): modelling of DTG and TG curves
TL;DR: In this article, the thermal behavior of poly(methyl methacrylate) (PMMA) with average molecular weights of 996,000 and 350,000 g mol was investigated by thermogravimetric analysis in dynamic conditions at four different heating rates: 2, 5, 8 and 10 K min.
Journal ArticleDOI
Analysis of aluminium based alloys by calorimetry: quantitative analysis of reactions and reaction kinetics
TL;DR: Differential scanning calorimetry has been applied extensively to the analysis of light metals, especially Al-based alloys as discussed by the authors, and is used for analysis of solid state reactions, such as precipitation, homogenisation, devitrivication and recrystallisation.
Journal ArticleDOI
The multi-scale challenges of biomass fast pyrolysis and bio-oil upgrading: Review of the state of art and future research directions
Mahdi Sharifzadeh,Mahdi Sharifzadeh,Majid Sadeqzadeh,Miao Guo,Tohid N. Borhani,N. V. S. N. Murthy Konda,Marti Cortada Garcia,Lei Wang,Jason P. Hallett,Nilay Shah +9 more
TL;DR: In this paper, a comprehensive multi-scale review of the state of the art in fast pyrolysis is presented, as well as their multiscale interactions, including the reaction mechanisms and kinetics.
Journal ArticleDOI
Crystallization kinetics and nucleation activity of filler in polypropylene/surface-treated SiO2 nanocomposites
TL;DR: In this article, isothermal and non-isothermal crystallization kinetics of polypropylene (PP)/surface-treated SiO 2 nanocomposites were extensively studied, and the effective energy barrier was estimated as a function of the relative degree of crystallinity using the isoconversional analysis of calorimetric data.
Journal ArticleDOI
Basics and Applications of Solid-State Kinetics: A Pharmaceutical Perspective
Ammar Khawam,Douglas R. Flanagan +1 more
TL;DR: Controversies have arisen with regard to interpreting solid-state kinetic results, which include variable activation energy, calculation methods, and kinetic compensation effects.
References
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Journal ArticleDOI
The Application of Thermoanalytical Techniques to Reaction Kinetics: The Thermogravimetric Evaluation of the Kinetics of the Decomposition of Calcium Oxalate Monohydrate
Eli S. Freeman,Benjamin Carroll +1 more
Journal ArticleDOI
Kinetic analysis of thermogravimetric data
TL;DR: The kinetic analysis of the thermogram, by use of either its exact equation or a more convenient approximation formula, is straightforward in cases of volatilization via simple kinetics as mentioned in this paper.
Journal ArticleDOI
The kinetics of the thermal degradation of polystyrene and polyethylene
David A. Anderson,Eli S. Freeman +1 more
TL;DR: The nonisothermal method of Freeman and Carroll was used to investigate the kinetics of the thermal degradation of polyethylene and polystyrene and the results of this investigation are compared with the kinetic parameters reported by other investigators as mentioned in this paper.
Journal ArticleDOI
The kinetics of the thermal degradation of the synthetic styrenated polyester, laminac 4116
David A. Anderson,Eli S. Freeman +1 more
TL;DR: In this paper, the authors investigated the thermal decomposition of polyester, Laminac 4116, at atmospheric pressure by means of a continuous recording thermobalance and by differential thermal analysis.
Journal ArticleDOI
LXXX. Some new values for the exponential integral
C.A. Coulson,W.E. Duncanson +1 more