نتایج جستجو برای: isoconversional methods

تعداد نتایج: 1874444  

2011
Yunqing Han Haixiang Chen Naian Liu

A simple and precise incremental isoconversional integral method based on Li-Tang (LT) method is proposed for kinetic analysis of solid thermal decomposition, in order to evaluate the activation energy as a function of conversion degree. The new method overcomes the limitation of LT method in which the calculated activation energy is influenced by the lower limit of integration. By applying the...

Journal: :Journal of nanoscience and nanotechnology 2008
Grace Chigwada Everson Kandare Dongyan Wang Stephen Majoni Darlington Mlambo Charles A Wilkie Jeanne M Hossenlopp

Organically-modified montmorillonite (MMT) clays have been prepared using ammonium salts containing quinoline, pyridine, benzene, and styrenic groups. The nanocomposites were prepared by melt blending and the formation of nanocomposites was characterized using X-ray diffraction (XRD) and transmission electron microscopy (TEM). Thermal stability and flammability were evaluated by thermogravimetr...

2005
Jelena Macan Ivan Brnardić Sebastijan Orlić Hrvoje Ivanković Marica Ivanković

Degradation kinetics of organic-inorganic hybrid materials based on epoxy resin was investigated by thermogravimetric analysis (TGA). The hybrid materials were prepared from diglycidyl ether of bisphenol A (DGEBA) and 3-glycidyloxypropyltrimethoxysilane (GLYMO) polymerised simultaneously by poly(oxypropylene)diamine (Jeffamine D230). Nanometric level of homogeneity in the hybrids was verified b...

Journal: :Case Studies in Thermal Engineering 2022

To better understand the thermochemical conversion for pyrolysis recycling of cable waste, kinetics typical filler was investigated in detail. Thermogravimetric experiments were conducted at different heating rates ranging from 5 °C/min−1 to 40 °C/min−1. Three degradation stages observed process pyrolysis. The influence air on superposition first two peaks also identified. activation energy cal...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده زبانهای خارجی 1391

since its introduction in 1959, translation quality assessment (tqa) has been among the most addressed research topics in translation studies. during recent years, there has been a crucial increase on the study of tqa. various methods have come on scene. although these methods are based on scientific theories, most of them have remained at the level of theory. juliane house’s model is among tho...

Journal: :Energies 2021

In this study, the combustion of olive byproducts was investigated using TG-FTIR technique. Different types biomass were considered: twigs, leaves, olive-mill waste from two-phase decanting method, and wastewater three-phase system. The reaction regions, ignition, burnout temperatures at different heating rates determined TG/DTG analysis thermogravimetry results. Comprehensive combustion, burno...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی خواجه نصیرالدین طوسی - دانشکده مهندسی برق و کامپیوتر 1391

power transformers are important equipments in power systems. thus there is a large number of researches devoted of power transformers. however, there is still a demand for future investigations, especially in the field of diagnosis of transformer failures. in order to fulfill the demand, the first part reports a study case in which four main types of failures on the active part are investigate...

2017
Valentina Buda Minodora Andor Adriana Ledeti Ionut Ledeti Gabriela Vlase Titus Vlase Carmen Cristescu Mirela Voicu Liana Suciu Mirela Cleopatra Tomescu

This paper presents the results obtained after studying the thermal stability and decomposition kinetics of perindopril erbumine as a pure active pharmaceutical ingredient as well as a solid pharmaceutical formulation containing the same active pharmaceutical ingredient (API). Since no data were found in the literature regarding the spectroscopic description, thermal behavior, or decomposition ...

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