نتایج جستجو برای: isoconversional model

تعداد نتایج: 2104386  

Journal: :Polymer Degradation and Stability 2021

Considering their increasing use in high-temperature aeronautical applications, thermoplastic-based laminates have to meet certification requirements terms of critical service conditions (e.g. aircraft engine's fire). This work is aimed at identifying the most relevant approach model isothermal decomposition C/PPS composites. The first step understanding thermal these materials relies on TGA an...

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...

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...

ژورنال: مواد پرانرژی 2017

In this work, thermal degradation behavior of a solid composite propellant containing Epoxy/Ammonium perchlorateStrontium nitrateAnthracene composite was studied by simultaneous thrmogravimetric analysis and differential scanning calorimetry under dynamic nitrogen atmosphere at different heating rates. Variation curves of the thermal degradation activation energy of EpoxyAmmonium perchlorateStr...

One of the decisive factors in obtaining the desired properties in coatings is their complete curing, which necessitates the study of kinetics of curing. In recent years, many studies have been conducted on the use of polyhedral oligomeric silsesquioxane (POSS) in coatings. Creating functional groups on POSS and using it in formulation can create new or improve the properties of coatings. I...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد گرمسار - پژوهشکده علوم انسانی و اجتماعی 1391

abstract the present study was conducted to investigate the effect of using model essays on the development of writing proficiency of iranian pre-intermediate efl learners. to fulfill the purpose of the study, 55 pre- intermediate learners of parsa language institute were chosen by means of administering proficiency test. based on the results of the pretest, two matched groups, one as the expe...

Journal: :Journal of Applied Polymer Science 2021

Abstract During curing of thermosetting resins the technologically relevant properties binders and coatings develop. However, is difficult to monitor due multitude chemical physical processes taking place. Precise prediction specific technological based on molecular very difficult. In this study, potential principal component analysis (PCA) regression (PCR) in Fourier transform infrared (FTIR) ...

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