نتایج جستجو برای: thermal oxidative degradation

تعداد نتایج: 485234  

2015
Ozgur Tataroglu Xiaohu Zhao Ania Busza Jinli Ling John S. O’Neill Patrick Emery

Graphical Abstract Highlights d Calcium and the protease SOL trigger TIM degradation in response to thermal input d Thermal TIM degradation resets the Drosophila circadian pacemaker d TIM integrates light and temperature input d In mammals, the SOL homolog also impacts circadian thermal responses In Brief Temperature phase shifts the Drosophila circadian clock through the regulated degradation ...

2011
S. Straus

Fortisan, cellulose triacetate, and NOroxidized cellulose were pyrolyzed in a vacuum in the temperature range 1800 to 465 0 C. Cotton cellulose and cellulose t ri acetate were also pyrolyzed in nitrogen at atmospheric pressure. The tar yields were in the decreasing order from: Cotton, Fortisan, cellulose triacetate, and oxidized cellulose. The other volatiles consisted mainly of acetic acid, ca...

2013
D. JUAREZ

Thermal analysis (DSC: Differential Scanning Calorimetry and TGA: Thermogravimetric Analysis) of SEBS blends have been studied in this paper. SEBS blends were made using two transparent SEBS commercial grades with extreme hardness values. The first thermal property determined in SEBS blends was the evaluation of the thermal degradation at high temperatures (DSC). Another thermal property of the...

2015
Krishnan A. Iyer Gregory T. Schueneman John M. Torkelson

Cellulose nanocrystals (CNCs), a class of renewable bionanomaterials with excellent mechanical properties, have gained major interest as filler for polymers. However, challenges associated with effective CNC dispersion have hindered the production of composites with desired property enhancements. Here, composites of polypropylene (PP) and low density polyethylene (LDPE) with 5e10 wt% unmodified...

2008
D. BRAUN

A survey is given of the recent advances in the study of and the present knowledge of the thermal degradation of polyvinyl chloride. The sites for initiation of the thermal degradation, the mechanism of the dehydrochiorination, the discolouration of PVC by heat and the influence of plasticizers on the rate of degradation are discussed.

2003
T. D. Bradley A. Ball S. E. Harding J. R. Mitchell

Information about the thermal degradation of guar gum has been obtained from the time dependence of the viscosity at high temperatures measured using a slit viscometer. The viscosity is related to the molecular weight using previously published relations between the zero shear specific viscosity and the coil overlap parameter in conjunction with the appropriate Mark-Houwink equation. Unlike ani...

Journal: :International Journal of Greenhouse Gas Control 2021

This study investigates the comparative impact of inherently different biomass and coal ashes on laboratory pilot scale degradation 30 wt% aqueous monoethanolamine (MEA), relevant to post-combustion CO2 capture. Thermal oxidative experiments were carried out at 135 °C 40 respectively with loading (0.5 molCO2/molMEA), without presence ash. Nuclear magnetic resonance (NMR) data is provided for ma...

2012
Chakravartula S Srikanth Steven S C Chuang

Oxidative degradation characteristics of silica-supported amine sorbents with varying amounts of tetraethylenepentamine (TEPA) and polyethylene glycol (PEG; P(200) or P(600) represents PEG with molecular weights of 200 or 600) have been studied by IR and NMR spectroscopy. Thermal treatment of the sorbents and liquid TEPA at 100 °C for 12 h changed their color from white to yellow. The CO(2) cap...

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