Results 321 to 330 of about 579,743 (356)

Photo-crosslinked acrylates degradation kinetics

Journal of Thermal Analysis and Calorimetry, 2009
A series of crosslinked polyurethane acrylate solids with glass transition temperatures ranging from –49 to +65 °C was prepared by photopolymerization of specially formulated solvent-free resins. The kinetics of thermooxidative and thermal (in N2) degradation of these crosslinked acrylate networks at temperatures ranging from 100 to 400 °C was studied ...
Vadim V. Krongauz, Michael T. K. Ling
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Degradation Kinetics of Polypyrrole Films

Journal of The Electrochemical Society, 1993
Kinetic measurements have been made on the degradation reaction of electrochemically prepared polypyrrole films. The measurements were made by applyin proper potentials at polymer film covered electrodes in aqueous sulfuric acid solutions and monitoring the absorbance of the electrolysis product as a function of time.
Deog‐Soo Park, Yoon‐Bo Shim, Su‐Moon Park   +2 more
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Kinetic Treatments of Degradation

1996
Most photodegradation experiments are usually carried out in isothermal conditions, whereas polymers and plastics work in the environmental conditions within non-isothermal parameters. The rates of many degradation processes in polymers generally increase as the temperature rises.
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Kinetics of the photocatalytic degradation of benzene

Catalysis Today, 2007
The kinetics of photocatalytic degradation of benzene in air has been studied on a standardized micro-pilot scale continuous flow apparatus. Both the yield of conversion of the reactant and the apparition of CO and CO2 have been monitored. The influences of concentration, light flux and temperature on the initial degradation rate have been studied.
Doucet, Nicolas, Zahraa, Orfan, Bouchy, Michel   +2 more
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Stereoselective degradation kinetics of tebuconazole in rabbits

Chirality, 2006
AbstractTebuconazole[(RS)‐1‐p‐chlorophenyl‐4,4‐dimethyl‐3‐(1H‐1,2,4‐triazol‐1‐ylmethyl)pentan‐3‐ol] is a potent triazole fungicide and consists of a pair of enantiomers. The enantioselective degradation kinetics of tebuconazole was investigated in rabbits by intravenous (iv) injection. The concentrations of (−)‐(R)‐tebuconazole and (+)‐(S)‐tebuconazole
Wentao, Zhu, Jing, Qiu, Ziheng, Dang, Chunguang, Lv, Guifang, Jia, Li, Li, Zhiqiang, Zhou   +6 more
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Kinetics of the chemical degradation of diuron

Chemosphere, 2002
The influence of pH and buffer concentration on the chemical degradation of diuron in water has been analysed over a wide temperature range. The process irreversibly gives 3,4-dichloroaniline as the only product containing the phenyl ring. H+, OH- and phosphate buffer are efficient catalysts of the reaction. The rate constant first increases rapidly at
SALVESTRINI, Stefano, DI CERBO P, CAPASSO S.   +2 more
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Continuous Kinetics of Dextran Degradation

Journal of Macromolecular Science, Part A, 1997
Degradation of dextranes is studied in the framework of a first-order continuous kinetics. Here, the dextranes are approximately described by Schulz-Flory distributions, the parameters of which depend on the time. A new expression is introduced for the continuous rate function which is the continuous generalization of the rate constants of usual ...
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Degradation Kinetics of Somatostatin in Aqueous Solution

Drug Development and Industrial Pharmacy, 2003
The degradation kinetics of somatostatin (somatotropin release inhibiting factor), a cyclic tetradecapeptide, was investigated as a function of temperature, pH, ionic strength, buffer type, and buffer concentration. In addition, the effect of different container materials in which the solutions were stored and the presence of an antimicrobial agent for
Joachim, Herrmann, Roland, Bodmeier
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Degradation kinetics of thermal oxides

Applied Physics Letters, 2001
In this letter I propose a kinetics model of trap creation in thermal oxides under electrical stress. The model is based on the idea that electrons drifted in the oxide conduction band by the stress field undergo scattering by existing defects. The process controls the creation of additional traps.
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Kinetics of thermal degradation

2023
Krzysztof Pielichowski, James Njuguna, Tomasz M. Majka   +2 more
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