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Non-isothermal crystallization and thermal degradation studies on nylons 7,10 and 10,7 as isomeric odd-even and even-odd polyamides Thermochim. Acta (IF 3.5) Pub Date : 2024-03-13 Matteo Arioli, Lourdes Franco, Jordi Puiggalí
Aliphatic polyamides (nylons) show a remarkable variability in terms of crystallographic structures, polymorphic transitions and crystal morphology despite all polymers of this family have a simple constitution that is based on amide groups and polymethylene segments. Nylons derived from diamines and dicarboxylic acids having different parity (e.g., even or odd) have peculiar characteristics due to
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Performance evaluation approach for accelerating rate calorimeters by means of Joule heat Thermochim. Acta (IF 3.5) Pub Date : 2024-03-11 Weixiang Liang, Zixin Ye, Dongfang Hu, Jinxin Xu, Juncheng Jiang, Thomas Fröhlich, Jiong Ding
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Curing kinetics of composites based on benzoxazine resin and microcrystalline cellulose modified by phosphorus salt Thermochim. Acta (IF 3.5) Pub Date : 2024-03-06 Wissam Bessa, Djalal Trache, Chahinez Ghalmi, Sabrine Aidi, Ahmed Fouzi Tarchoun, Feriel Gahfif, Amir Abdelaziz, Sourbh Thakur, M. Hazwan Hussin
A comprehensive investigation into the curing kinetics of composites based on bisphenol A aniline benzoxazine resin (BA-a) and microcrystalline cellulose (MCC) modified by phosphorylation (MCC-Ph), was conducted in this study. For this purpose, differential scanning calorimetry (DSC) analysis, at different heating rates, was used to examine the curing process. The kinetic parameters as a function of
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Descriptors applicability in machine learning-assisted prediction of thermal decomposition temperatures for energetic materials: Insights from model evaluation and outlier analysis Thermochim. Acta (IF 3.5) Pub Date : 2024-03-06 Zhixiang Zhang, Chao Chen, Yilin Cao, Linyuan Wen, Xiaokai He, Yingzhe Liu
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Unraveling solidification pathways of pure elements by ultra-slow temperature vs. time profile measurements Thermochim. Acta (IF 3.5) Pub Date : 2024-03-05 Rajkumar V.B., Ajeet K. Srivastav, Peisheng Wang, Yong Du
This study delves into the phase transformations of fifteen pure elements utilizing a synergistic approach combining arc-melting, a pyrometer, and its temperature vs. time output. Employing cooling curve recording tactics during arc-melting with an elite temporal resolution pyrometer unravels double recalescence in refractory metals (‘Mo,’ ‘Nb,’ ‘Ta,’ ‘W’). Metalloids, including ’B,’ ’Si,’ and ’Ge
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Targeted control of unsaturated polyester resin curing kinetics to enhance network regularity and achieve impressive improvement in mechanical properties using gamma-aluminia: Exploring the relationship between curing kinetics and mechanical properties Thermochim. Acta (IF 3.5) Pub Date : 2024-02-16 Elham Rouhi, Mehdi Poorabdollah, Kiumars Bahrami
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Butyric acid, putrescine and their mixture as potential fly attractants: Complexation, thermal analysis and volatility characterisation Thermochim. Acta (IF 3.5) Pub Date : 2024-02-16 Franco Pretorius, Elizabeth L. du Toit, Isbé van der Westhuizen, Maria T. Atanasova, Walter W Focke
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Changes in the devolatization kinetics induced by washing pretreatments of short- and long-aged food crop residues Thermochim. Acta (IF 3.5) Pub Date : 2024-02-15 Carmen Branca, Colomba Di Blasi
Thermogravimetric curves are measured and modeled to quantify the changes induced by dilute acid or hot water washing on the devolatilization of short- and long-aged potato crop residues. The pretreatments cause more similar behaviors. A six-step devolatilization mechanism for four pseudo-components, previously developed for raw materials, is still applicable. The activation energies remain unvaried
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Direct synthesis of porous aluminum nitride foams for enhancing heat transfer and anti-leakage performance of phase change materials Thermochim. Acta (IF 3.5) Pub Date : 2024-02-15 Rui Chen, Deheng Li, Nan Sheng, Chunyu Zhu
Organic phase change materials (PCMs) suffer from low thermal conductivity and easy leakage, which limit their application in heat storage and thermal management. In this work, porous AlN skeletons were synthesized to solve these problems of paraffin PCM. Using Al powders as raw material, porous AlN skeletons were prepared through the ice-templated method and the direct nitridation reaction. The skeletons
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Very long-time crystallization kinetics for ethylene-methacrylic acid ionomers neutralized with zinc, sodium, lithium and magnesium Thermochim. Acta (IF 3.5) Pub Date : 2024-02-12 Brian P. Grady
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A study on molecular association in FLiNaK by high temperature mass spectrometry and Raman spectroscopy Thermochim. Acta (IF 3.5) Pub Date : 2024-02-11 Rimpi Dawar, U. Jain, A. Das, S. Narang, N. Maiti, R. Tewari, R. Mishra
Thermodynamics of coolant salt of MSRs, i.e., FLiNaK (eutectic mixture of LiF, NaF and KF) is important to understand the nature of its interaction with structural materials and to predict the long-term stability of reactor cooling channels. Here, we report thermodynamic activities of LiF, NaF and KF in molten FLiNaK measured employing a high temperature Knudsen Effusion Mass Spectrometer. The activity
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Isoconversional methods: The many uses of variable activation energy Thermochim. Acta (IF 3.5) Pub Date : 2024-02-11 Sergey Vyazovkin
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Synthesis, characterization and thermal decomposition mechanism of new 5-amino-3-hydrazinyl-1H-1,2,4-triazole-based energetic materials Thermochim. Acta (IF 3.5) Pub Date : 2024-02-10 Zhen-Li Yang, Ya-Dong Yao, Jian-Guo Zhang, Qiang Xie, Feng Liu, Zhi-Wei He, Zu-Jia Lu
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Non-isothermal crystallization kinetics of calcium pyroniobate (Ca2Nb2O7) in SiO2-CaO-Nb2O5-Na2O-MgO-Al2O3 glass Thermochim. Acta (IF 3.5) Pub Date : 2024-02-09 Wensheng Han, Mengjie Ran, Chang Chen, Guoxing Ren, Wen Chen
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Thermal decomposition kinetics and mechanism of poly(ethylene 2,5-furan dicarboxylate) Nanocomposites for food packaging applications Thermochim. Acta (IF 3.5) Pub Date : 2024-02-07 Johan Stanley, Evangelia Tarani, Nina Maria Ainali, Tjaša Kraševac Glaser, Lidija Fras Zemljič, Konstantinos Chrissafis, Dimitra A. Lambropoulou, Dimitrios N. Bikiaris
Poly(ethylene 2,5-furan dicarboxylate) (PEF) based nanocomposites containing different nanoparticles like Ag, TiO, ZnO, ZrO Ce-Bioglass, have been synthesized via in-situ polymerization techniques targeting food packaging applications. Zeta potential measurements showed an increase in the negative zeta potential value due to an increase in the surface charge density of the nanocomposites. Thermogravimetric
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Extended kinetic approach to reversible thermal decomposition of solids: A universal description considering the effect of the gaseous product and the kinetic compensation effect Thermochim. Acta (IF 3.5) Pub Date : 2024-02-06 Mito Hotta, Nobuyoshi Koga
The kinetics of the reversible thermal decomposition of solids, simplified as A(s) ⇌ B(s) + C(g), is universally described, as a function of temperature (), degree of reaction (), and partial pressure of gaseous product ((C(g))) concerning the equilibrium pressure (()) of the reaction, with the aid of an accommodation function (((C(g)), ())). The kinetic curves of the reaction at different (C(g)) values
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Application of the orthogonal collocation method in evaluating the rate of reactions using thermogravimetric analysis data Thermochim. Acta (IF 3.5) Pub Date : 2024-02-05 Alireza Aghili, Amir Hossein Shabani
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Enhancing thermal transport in ABS polymer with graphene oxide: Insights into low-temperature thermal conductivity behavior and correlation with Boson peak anomaly Thermochim. Acta (IF 3.5) Pub Date : 2024-02-04 A.I. Krivchikov, A. Jeżowski, V.A. Konstantinov, V.V. Sagan, O.A. Korolyuk, D. Szewczyk
The thermal conductivity of pure ABS polymer and ABS polymer composite with 0.5 wt% of the thermally reduced graphene oxide (trGO) was measured in a wide temperature range from 2 to 100 . Adding 0.5 % trGO enhanced the thermal conductivity of ABS polymer by 1.5 times over the entire temperature range. A comparison of the thermal conductivity of ABS and epoxy-resin amorphous polymers and structural
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Thermomechanical behavior of polyurethane nanocomposite foams containing organoclay particles modified with bio-based fatty acid Thermochim. Acta (IF 3.5) Pub Date : 2024-02-03 Emel Onder, Nihal Sarier
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Detecting reorganization in semicrystalline polymers during heating: Insights from Fast Scanning Chip Calorimetry coupled with real-time optical microscopy Thermochim. Acta (IF 3.5) Pub Date : 2024-02-03 Alexey P. Melnikov, Dimitri A. Ivanov
Thermal behavior of semicrystalline polymers is notoriously complex due to the metastable nature of polymer crystals. This complexity is evidenced in the multiple melting endotherms frequently observed in the heating traces of various plastics, a phenomenon known as ‘multiple melting behavior’. Extensive research indicates that calorimetric analysis alone may not suffice to fully elucidate the processes
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Heat dissipation analysis and correction of the sample in accelerating rate calorimetric experiment Thermochim. Acta (IF 3.5) Pub Date : 2024-02-03 Desheng Chen, Ke Liu, Zixin Ye, Gao Zhang, Jinxin Xu, Dongfang Hu, Jiong Ding
The accelerating rate calorimeter is a commonly used tool for evaluating thermal hazards. Due to the thermal inertia, the heat dissipation between the reaction system and the furnace, the pure adiabatic condition cannot be achieved. This leads to inaccurate thermodynamic and kinetic results. To systematically study and correct this heat dissipation, numerical simulations and experiments were carried
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Isoconversional methods as single-step kinetic approximation Thermochim. Acta (IF 3.5) Pub Date : 2024-01-29 Sergey Vyazovkin, Nicolas Sbirrazzuoli
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Applicability of model free isothermal prediction procedures based on the Friedman method and three incremental isoconversional methods for complex processes Thermochim. Acta (IF 3.5) Pub Date : 2024-01-28 Petru Budrugeac
The possibility of using the model free isothermal prediction procedures for complex processes was critical analyzed. Such procedures based by isoconversional method suggested by Friedman, and three incremental isoconversional methods have been suggested and verified for simulated data corresponding to two first order parallel-competing reactions and two first order consecutive reactions. It has been
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Isoconversional methods: A powerful tool for kinetic analysis and the identification of experimental data quality Thermochim. Acta (IF 3.5) Pub Date : 2024-01-26 Evangelia Tarani, Konstantinos Chrissafis
This study explores the significance of isoconversional methods in thermal analysis and their pivotal role in evaluating the quality of experimental data. The thermal degradation of polylactic acid tannin nanocomposite and the non isothermal crystallization of poly(ethylene 2,5-furandicarboxylate) carbon nanotubes nanocomposites were studied. Four commonly used methods were employed to calculate activation
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Thermal conductivities of nylon thin films measured by ISO 11357-8 method Thermochim. Acta (IF 3.5) Pub Date : 2024-01-26 Kefeng Xie, Feihu Xue, Yongxuan Chen, Xiaoning Ren, Wenbing Hu
Recently, based on conventional DSC apparatus, International Organization for Standardization (ISO) released ISO 11357-8 method for measuring the thermal conductivity of plastics. We followed its protocol to evaluate this new standard method and made DSC measurements on the thermal conductivities of Nylon 46, Nylon 66 and Nylon 610 thin films at the melting point of indium. We found the measurement
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Advanced isoconversional kinetic analysis: Insight in mechanisms and simulations. Successes and future Thermochim. Acta (IF 3.5) Pub Date : 2024-01-24 Nicolas Sbirrazzuoli
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Thermogravimetric analysis (TGA) for characterization of self-cementation of recycled concrete aggregates in pavement Thermochim. Acta (IF 3.5) Pub Date : 2024-01-18 Chong Wang, Cyrille Chazallon, Sandrine Braymand, Pierre Hornych
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Study on the characteristics of gas phase products in coal mine conveyor belt fire Thermochim. Acta (IF 3.5) Pub Date : 2024-01-18 Duo Zhang, Maoxia Liu, Hu Wen, Ziqi Wang, Weifeng Wang, Xiangjun Kong, Jianquan Bing
This study aimed to use the thermogravimetric infrared coupling (TG-FTIR) and cone calorimeter coupling techniques to analyse the Pyrolysis characteristics and fire hazard of conveyor belt during heating process based on different stages of the combustion process. The results demonstrate that the conveyor belt is melted and volatilized by heat in the first stage (200∼350 °C), and a cross-linking polymerization
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Study on the ablation behavior of C/SiC composite materials under the action of local structural thermal sources Thermochim. Acta (IF 3.5) Pub Date : 2024-01-18 Junru Wang, Zhigang Zhang, Dong Zhi, Weihua Xie, Yuanjian Yang, Sen Liu, Songhe Meng
This study uses ablation testing on C/SiC composite materials under local structured thermal sources with a wide range of heat flux densities, simulating the harsh local conditions caused by discontinuous structural interference on spacecrafts. The thermal response, ablation laws, and ablative perforation time of C/SiC composite materials are obtained under different heat flux densities. The experimental
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Thermal behaviors and kinetic analysis of dicyclohexylmethane-4,4′-diisocyanate (HMDI) Thermochim. Acta (IF 3.5) Pub Date : 2024-01-12 Xiao Wang, Xia Yang, Shiqing Zheng
Programmed heating measurements were performed by differential scanning calorimeter (DSC) to obtain thermal parameters. The expression of the optimal kinetic mechanism model for the thermal behaviors of dicyclohexylmethane-4,4′-diisocyanate (HMDI) under the five heating rates is f(α)=α0.41(1−α)0.93 by fitting DSC curves. The thermal behaviors under adiabatic conditions and the time to conversion limit
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The influence of ionic form and Cu2O particles on thermal stability of carboxylic cation exchangers Thermochim. Acta (IF 3.5) Pub Date : 2024-01-12 Elżbieta Kociołek-Balawejder, Ewa Stanisławska, Irena Jacukowicz-Sobala, Igor Mucha
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Flash point and safety evaluation of binary mixture of diphenyl ether + biphenyl: A commonly utilized heat transfer fluid Thermochim. Acta (IF 3.5) Pub Date : 2024-01-09 Kazem Lakzian, Horng-Jang Liaw
The binary mixture of diphenyl ether and biphenyl finds wide applications in various industries. Notably, it is widely utilized in renewable energy systems such as concentrated solar power (CSP) facilities. This study addresses the lack of research on the flash point (FP) behavior of this blend, crucial due to high operating temperatures in related processes, especially when used as a heat transfer
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Continuous cooling and isothermal solidification analysis of AlSi10Mg using differential fast scanning calorimetry Thermochim. Acta (IF 3.5) Pub Date : 2024-01-09 Qin Peng, Yunhu Zhang, Bin Yang, Jette Broer, Armin Springer, Christoph Schick, Olaf Keßler
This study investigates the solidification process of individual micro-sized AlSi10Mg particles using continuous cooling and isothermal differential fast scanning calorimetry (DFSC) methods at a range of cooling rates (from 500 K/s to 50,000 K/s) and temperatures (from 562 °C to 502 °C). The solidification microstructure consists of fine α-Al dendrites and (α-Al + Si) eutectics. Both dendrite arm spacing
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Quantification of enthalpy of extraction of Eu(III)-glycolamide solvent systems using isothermal solution calorimetry-Influence of extraction parameters and solvent aggregation Thermochim. Acta (IF 3.5) Pub Date : 2024-01-03 T. Prathibha, G. Jogeswara Rao, S. Balakrishnan, N. Ramanathan
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Theoretical prediction and experiment study on the thermo-physical properties of ternary carbonate for energy storage Thermochim. Acta (IF 3.5) Pub Date : 2024-01-03 Zhoujian An, Shuai Mao, Xiaoze Du, Renhui Zhang, Lu Li, Dong Zhang
This study calculated the optimal formula (sample A) of ternary carbonate based melting salt using a phase diagram firstly and other four sets of ternary carbonates with different ratios were prepared by changing the content of sodium carbonate and lithium carbonate. The results showed that sample A had better comprehensive thermophysical properties, the melting point, phase change enthalpy, upper
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Influence of cross-link density on the non-isothermal crystallization kinetics of polybutylene terephthalate Thermochim. Acta (IF 3.5) Pub Date : 2024-01-07 Albert Abdullin, Timur Magsumov, Aleksandra Kusova, Andrei Sokolov, Timur Mukhametzyanov, Igor Sedov
Kinetics of crystallization of the samples of cross-linked polybutylene terephthalate with different cross-link densities was studied experimentally using conventional differential scanning calorimetry (cooling rates 5 to 40 K·min–1) and fast scanning calorimetry (cooling rates 0.5 to 5000 K·s–1). The samples were obtained by copolycondensation of terephthaloyl chloride, 1,4-butanediol, and glycerol
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Thermogravimetric experimental study on the co-combustion of coal gangue and polypropylene Thermochim. Acta (IF 3.5) Pub Date : 2023-12-29 Jingkuan Li, Xinhua Hu, Xiaolei Qiao
To address the challenges posed by the challenging ignition, low volatile content, and high ash content of coal gangue (CG) during separate combustions, a proposed treatment involves mixing CG with polypropylene (PP), offering the potential for centralized treatment. Co-combustion experiments were carried out at varying ratios, and a corresponding model for co-combustion was established. The thermal
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Temperature corrections for coaxial cylindrical viscosity measurement method on molten salt Thermochim. Acta (IF 3.5) Pub Date : 2023-12-24 Kent P. Detrick, Nicholas Jones, John Detrick, Joseph Talley, Tyler Green, Matthew Memmott
Modern industrial applications often require accurate measurements of high temperature fluids such as molten salts. However, the commonly used coaxial cylindrical viscosity measurement method has an intrinsic bias when the calibration fluid and test fluid are run at significantly different temperatures due to the thermal expansion of solid container materials. In this study, we take a novel approach
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Experimental evaluation of the effect of sulfur content on the spontaneous combustion characteristics parameters of coal Thermochim. Acta (IF 3.5) Pub Date : 2023-12-23 Qinghua Zhang, Xiaoliang Jia, Dong Wang
The coal spontaneous combustion (CSC) is the main hazard threatening the coal safety production. In this work, the CSC characteristic, CSC tendency and limit parameters with different sulfur were measured and discussed using temperature-programmed experiment. The results show that the cross-point temperature (CPT) decreases first and then increases with the increasing sulfur content. The CSC tendency
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Synthesis and properties of novel bismaleimide containing allyl group and twisted structure Thermochim. Acta (IF 3.5) Pub Date : 2023-12-22 Jilei Xu, Ping Chen, Shuaijiang Ma, Guohao Zhu
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Thermal insulation properties of rigid polyurethane foam modified with fly ash- a comparative study Thermochim. Acta (IF 3.5) Pub Date : 2023-12-17 Beata Hadała, Beata Zygmunt-Kowalska, Monika Kuźnia, Artur Szajding, Tadeusz Telejko
Limitations in natural resource availability have a significant impact on prices of thermal energy. As a result, a growth of interest in the technology of insulation materials is observed. The paper presents a comparative analysis of rigid polyurethane foams, which are widely used as insulation materials. Rigid polyurethane foam with 10 wt.% addition of coal fly ash is compared to a reference foam
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Ethylene and propylene sorption kinetics on hard coals Thermochim. Acta (IF 3.5) Pub Date : 2023-12-16 Agnieszka Dudzińska
Ethylene and propylene are gases released to the mine air together with the increase in the temperature of coal as part of self-heating. The concentrations of these hydrocarbons in the mine air are used as indices to assess the development of the coal self-heating process. This paper presents the results of tests involving coal adsorption capacity as well as ethylene and propylene sorption kinetics
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The effects of various boron compounds on the thermal, microstructural and mechanical properties of PLA biocomposites Thermochim. Acta (IF 3.5) Pub Date : 2023-12-16 Ali Avci, Aysegul Akdogan Eker, Mehmet Safa Bodur, Bedri Onur Küçükyildirim
This study aims to understand how ulexite, boric acid-borax mixtures (1:1), and zinc borate fillers affect the thermal and mechanical properties of the poly (lactic acid) (PLA). For this purpose, three different boron fillers were added to the PLA matrix at four different concentrations of 3 %, 5 %, 8 %, and 12% wt. UL-94 test was conducted to comprehend the impacts of boron fillers on the fire resistance
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Experimental thermochemical study of aryl nitriles: a structural energetic approach Thermochim. Acta (IF 3.5) Pub Date : 2023-12-17 Juan Rodríguez-Santiago, Luisa E. Lagunas-Pérez, Fernando Ramos, E. Adriana Camarillo, Henoc Flores
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Evaluating the effect of ammonium nitrate-based cocrystals on the properties and thermokinetic characteristics of a double-base propellant Thermochim. Acta (IF 3.5) Pub Date : 2023-12-16 Hani Boukeciat, Ahmed Fouzi Tarchoun, Djalal Trache, Amir Abdelaziz, Ayemen Bouhantala, Chamseddine Bousstila, Thomas M. Klapötke, Sourbh Thakur
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Thermal studies on Tremella fuciformis polysaccharide-water interaction Thermochim. Acta (IF 3.5) Pub Date : 2023-12-14 Mika Iijima, Shuang Ma, Momoko Asano-Oritani, Tatsuko Hatakeyama
Characteristic features of polysaccharide derived from fungi (Tremella fuciformis), which are believed to have medical attributes for longevity, were investigated from the viewpoint of water interaction properties. Phase transition behaviour of Tremella fuciformis polysaccharide (TFP) in the presence of water in a range from 0 to 2.5 (mass of water / mass of dry sample, g g−1) was measured by differential
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Thermal decomposition kinetics and mechanisms of long alkyl chain ionic liquids with carboxylate anions Thermochim. Acta (IF 3.5) Pub Date : 2023-12-12 Jean C.B. Vieira, Marcos A. Villetti, Caroline R. Bender, Clarissa P. Frizzo
This work presents the synthesis and analysis of the thermal decomposition kinetics and mechanisms of long alkyl chain ionic liquids (ILs) with cations 1-decyl-3-methylimidazolinium ([C10MIM]+), 1-dodecyl-3-methylimidazolinium ([C12MIM]+), and 1-hexadecyl-3-methylimidazolinium ([C16MIM]+) and butanoate ([C3COO]−) and heptanoate ([C6COO]−) anions. The kinetics analysis was performed using the Kissinger-Akahira-Sunose
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An accurate analysis method of reaction critical state by stoichiometric window function Thermochim. Acta (IF 3.5) Pub Date : 2023-12-12 Huang Qian, Xia Hongde, Wei Kai
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Assessing the feasibility of recovering heat from Mung Bean sprout production for food consumption Thermochim. Acta (IF 3.5) Pub Date : 2023-12-12 Klaudia Słomczyńska, Paweł Mirek, Marcin Panowski, Diana Saja-Garbarz, Anna Janeczko, Andrzej Skoczowski
Given the current challenges posed by climate change and depletion of conventional fuel resources, there is a need to focus on improving energy efficiency through the recovery of waste energy. One such potential source of low-temperature waste heat is the process of seed germination during food plant cultivation. In traditional production facilities, germinating plants generate low-temperature heat
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Thermophysical properties of lunar regolith simulant LHS-1 and ice sublimation kinetics in its mixtures with frozen water Thermochim. Acta (IF 3.5) Pub Date : 2023-12-07 Dominic H. Austen, Evgeny Shafirovich
A recently developed lunar regolith simulant LHS-1 is used currently to advance the technologies for water extraction from icy regolith in the polar regions of the Moon. However, thermophysical properties of LHS-1 at low temperatures have not been studied yet, which hinders the development of these technologies. It is also unclear whether experimental data on the rate of ice sublimation in LHS-1/ice
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A new insight into the mechanism of solid-state cyclization of dipeptides: The effect of the sequence of amino acid residues in phenylalanyl-leucine and leucyl-phenylalanine Thermochim. Acta (IF 3.5) Pub Date : 2023-12-10 Radik A. Larionov, Sufia A. Ziganshina, Khasan R. Khayarov, Alexander E. Klimovitskii, Alexander V. Gerasimov, Valery V. Gorbatchuk, Natalia V. Lantsova, Marat A. Ziganshin
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Mesomorphism of (E)-4-[(4-propyloxyphenyl)diazenyl]phenyl alkanoates (3OABOOCm) Thermochim. Acta (IF 3.5) Pub Date : 2023-12-10 Marcin Piwowarczyk, Aleksandra Deptuch, Anna Drzewicz, Ewa Juszyńska-Gałązka, Mirosław Gałązka, Zbigniew Galewski
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An alternative wood pyrolysis model based on TGA and cone calorimeter tests Thermochim. Acta (IF 3.5) Pub Date : 2023-12-09 Mariam ABDO, Hassan FLITY, Lucas TERREI, André ZOULALIAN, Rabah MEHADDI, Pierre GIRODS, Yann ROGAUME
Understanding the process of pyrolysis is crucial to achieve continuous progress in the efficient use of wood as a fuel source in various applications. In the literature, a wide range of kinetic models for wood pyrolysis has been introduced, varying from simpler to more complex and predictive. Some of these models are mathematical, with the sole objective of fitting the experimental results. The others
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Effect of annealing at Tg on the crystallization behaviors of Au49Ag5.5Pd2.3Cu26.9Si16.3 metallic glass revealed by nanocalorimetry Thermochim. Acta (IF 3.5) Pub Date : 2023-12-04 Luojia Zhang, Chenhui Wang, Hongyang Wu, Lilin Wang, Jun Yi, Qijie Zhai, Yulai Gao, Bingge Zhao
Crystallization of metallic glass is not only affected by undercooling but also influenced by microstructure. However, the role of structure in the crystallization is still ambiguous. In this study, nanocalorimetry with a rapid quenching rate was used to obtain the critical cooling rates suppressing nucleation and crystal growth, realizing the in-situ preparation of the amorphous phase. Based on the
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Flame retardant effect of lignin/carbon nanohorns/potassium carbonate composite flame retardant on fir pretreated under different methods Thermochim. Acta (IF 3.5) Pub Date : 2023-12-04 Manman Xue, Jie Xu, Yan Li, Wenke Jia, Hongguan Wang, Zhipeng Xie, Fanhui Guo, Feng Liang, Yixin Zhang, Jianjun Wu
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Nitration of biodiesel by acetyl nitrate: Kinetic study and chemical safety parameters Thermochim. Acta (IF 3.5) Pub Date : 2023-12-06 Imed Ben Talouba, Adji Diop, Kyllian Neveu, Laurent Balland, Nicolas Brodu, Nordine Mouhab
The aim of this study was to synthesize a bio-sourced substitute to the 2-Ethyl Hexyl Nitrate (EHN) by nitrating a biodiesel. EHN is commonly used to improve the auto-ignition properties of diesel fuels. The biodiesel was obtained by trans-esterification of canola oil. The nitration reaction of biodiesel by acetyl nitrate was carried out in a reaction calorimeter RC1 with semi-batch mode to study its
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Preparation and property measurement of ternary eutectic sodium salt with multiwalled carbon nanotubes Thermochim. Acta (IF 3.5) Pub Date : 2023-12-04 Jiahao Zhao, Zeyang Kang, Zhenhui Chen, Maogang He, Xiangyang Liu
In this study, NaF–NaCl–Na2CO3/multi-walled carbon nanotubes (MWCNTs) composites were prepared for high-temperature heat storage to increase the thermal conductivity of base salt. The impact of MWCNTs on the properties was tested. The test results demonstrated a marked improvement in the thermal diffusivity of NaF–NaCl–Na2CO3 after the addition of MWCNTs. Particularly, the composite with 1 wt% MWCNTs
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Investigating the thermal behavior of acyclovir Thermochim. Acta (IF 3.5) Pub Date : 2023-11-30 Luciano C.R. Rais, Jonatha de Freitas, Ana P.G. Ferreira, Éder T.G. Cavalheiro