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Journal articles on the topic 'DSC and kinetics of thermal decomposition'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Tsai, Lung Chang, Jian Ming Wei, Yung Chuan Chu, et al. "RDX Kinetic Model Evaluation by Nth Order Kinetic Algorithms and Model Simulations." Advanced Materials Research 189-193 (February 2011): 1413–16. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.1413.

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A kinetic model based on the thermal decomposition of 1,3,5-trinitro-1,3,5-triazmane (RDX) was constructed via differential scanning calorimetry (DSC), well-known kinetic equations, curve-fitting analysis, and simulations of thermal analysis. Our objective was to analyze thermokinetic parameters derived from heating rates used in DSC and compare simulations of thermal decomposition under various kinetic models. Experimental results were strongly dependent on the validity of the kinetic model, which was based on an appropriate mathematical model and a proper method for the evaluation of kinetic

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2

Nowak, Mariusz, Barbara Cichy, and Ewa Kużdżał. "Kinetics of melamine phosphate thermal decomposition in DSC studies." Journal of Thermal Analysis and Calorimetry 126, no. 1 (2016): 277–85. http://dx.doi.org/10.1007/s10973-016-5705-2.

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3

Gu, Jiangshan, Lu Liu, Huanhuan Chen, Wanghua Chen, Zichao Guo, and Liping Chen. "Study on the thermal decomposition kinetics of DNTF." E3S Web of Conferences 245 (2021): 01027. http://dx.doi.org/10.1051/e3sconf/202124501027.

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3,4-Dinitrofurazanylfuroxan (DNTF) is a representative of the third-generation energetic materials with complex thermal decomposition behavior. Understanding thermal decomposition process of DNTF is of great significance for the safety of its production, storage and use. In this paper, the dynamic differential scanning calorimetry (DSC) test is carried out to study its thermal decomposition characteristics. The quench and reheat experiments and isothermal tests were performed to determine the types of decomposition reactions. A four-step consecutive reaction model, A→B→C→D→E, where each step i

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4

Li, Yuehua, Yu Liu, Liping Chen, Wenqian Wu, Xiaoqiao Zhao, and Wanghua Chen. "Research on the thermal hazard of N-Nitrodihydroxyethyl dinitrate (DINA) under the action of diethanolamine." E3S Web of Conferences 245 (2021): 03026. http://dx.doi.org/10.1051/e3sconf/202124503026.

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N-Nitrodihydroxyethyl dinitrate (DINA) is a commonly used energetic material. In this work, the effect of diethanolamine (DEA) on the thermal stability of DINA was studied. Firstly, the decomposition kinetics of DINA under the influence of DEA was analyzed by applying dynamic differential scanning calorimeter (DSC) experiments. Then, isothermal DSC tests with the “Interruption and re-scanning” method determined that the decomposition reactions of DINA containing 29% DEA consists of four continuous steps: the first step is a n-order reaction, and the last three steps are autocatalytic reactions

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5

Liu, Rui, Tonglai Zhang, Li Yang, Zunning Zhou, and Xiaochun Hu. "Research on thermal decomposition of trinitrophloroglucinol salts by DSC, TG and DVST." Open Chemistry 11, no. 5 (2013): 774–81. http://dx.doi.org/10.2478/s11532-013-0205-8.

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AbstractThe thermal decomposition of the four nitrogen-rich salts of ammonia (NH4), aminoguanidine (AG), carbohydrazide (CHZ) and 5-aminotetrazo (ATZ) based on trinitrophloroglucinol (H3TNPG) was investigated using the differential scanning calorimetry (DSC), thermogravity (TG), and dynamic vacuum stability test (DVST). DSC and TG methods research the complete decomposition, while DVST method researches the very early reaction stage. The peak temperatures of DSC curves are consistent with the temperatures of maximum mass loss rates of TG curves. The apparent activation energies of these H3TNPG

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6

Perrenot, B., and G. Widmann. "TG and DSC kinetics of thermal decomposition and crystallization processes." Journal of Thermal Analysis 37, no. 8 (1991): 1785–92. http://dx.doi.org/10.1007/bf01912209.

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7

Chu, I. Tien, Shu Yao Tsai, Wan Tran Huang, Jo Ming Tseng, Jin Shuh Li, and Chun Ping Lin. "Modelling Method for Preventing Thermal Runaway Reaction Accident of Thermal Reactive Material." Advanced Materials Research 936 (June 2014): 2030–34. http://dx.doi.org/10.4028/www.scientific.net/amr.936.2030.

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Thermally reactive materials have caused many serious accidents involving storage and transportation, due to being thermally reactive. The safe storage and management of these materials still is a critical problem in many countries. We studied the thermal hazard of thermal reactive materials, such as a propellant, by employing differential scanning calorimetry (DSC) non-isothermal tests and isothermal tests, and then comparing the kinetic parameters by isothermal and non-isothermal of kinetics, avoiding the mistaken results of the single thermal analysis model. The chosen approach was to obtai

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Svoboda, Roman, Zuzana Olmrová Zmrhalová, Dušan Galusek, Daniela Brandová, and Jozef Chovanec. "Thermal decomposition of mixed calcium oxalate hydrates – kinetic deconvolution of complex heterogeneous processes." Physical Chemistry Chemical Physics 22, no. 16 (2020): 8889–901. http://dx.doi.org/10.1039/c9cp06867h.

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9

Kiselev, Vitaly G., Nikita V. Muravyev, Konstantin A. Monogarov, et al. "Toward reliable characterization of energetic materials: interplay of theory and thermal analysis in the study of the thermal stability of tetranitroacetimidic acid (TNAA)." Physical Chemistry Chemical Physics 20, no. 46 (2018): 29285–98. http://dx.doi.org/10.1039/c8cp05619f.

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Kinetics and mechanism of thermal decomposition of tetranitroacetimidic acid, a novel green energetic material, were studied using complementary thermoanalytical methods (DSC and TGA) and quantum chemistry (CCSD(T)-F12).

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10

Pan, Feng, Zai Yuan Li, and Chun Ji Li. "Study on Thermal Decomposition Kinetics of Nano-Cr(OH)₃Powder." Applied Mechanics and Materials 692 (November 2014): 377–80. http://dx.doi.org/10.4028/www.scientific.net/amm.692.377.

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Abstract. This paper studies on the thermal decomposition analysis kinetics of nanometer powders. The DTA-TG-DTG curves obtain by SDT 2960 Simultaneous DSC-TGA analysis apparatus. Under the condition of N2atmosphere operation and rise temperature velocity was 10°C·min-1. The mechanism function dα/dt=κ(1-α)nis used to calculate the kinetics factors. Reaction progressionnwas obtained by calculation of the kissinger peak shape factor method. The results showed that the apparent activation energy of nano-Ni(OH)2was 254.027 KJ·mol-1, the pre-exponential factor was 3.062×1036, the reaction progressi

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11

Hu, Fei, Lin-Jian Wang, Wei Zhao, et al. "Thermal Decomposition Kinetics and Compatibility of 3,5-difluoro-2,4,6-trinitroanisole (DFTNAN)." Materials 14, no. 15 (2021): 4186. http://dx.doi.org/10.3390/ma14154186.

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In this paper, the thermal decomposition behavior of 3,5-difluoro-2,4,6-trinitroanisole (DFTNAN) was studied by differential scanning calorimetry (DSC) and thermogravimetry (TG) by using different heating rates (2, 5, 10, 15 °C·min−1). Subsequently, the kinetic and thermodynamic parameters of non-isothermal thermal decomposition of DFTNAN were calculated. The critical temperature of thermal explosion (Tb) and self-accelerating decomposition temperature (TASDT) were determined to be 249.03 °C and 226.33 °C, respectively. The compatibility of DFTNAN with a number of high explosives (cyclo-1,3,5-

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12

Liu, Yunzhang, Lizhen Chen, Jianlong Wang, Jun Chen, Jingqi Wang, and Hongxia Pan. "The crystal structure and thermal decomposition kinetics of cis-hexanitrostilbene." Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials 77, no. 1 (2021): 150–57. http://dx.doi.org/10.1107/s2052520620015371.

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Hexanitrostilbene (HNS) is an energetic material with wide application and excellent comprehensive performance. cis-HNS is successfully prepared using crude HNS with a purity of 95% as the raw material and N-methyl pyrrolidone (NMP) as the solvent. After separation and purification, acetone is used as a solvent to obtain light-yellow crystals at room temperature. The molecular structure of cis-HNS is determined through analysis of Fourier transform infrared, 13C NMR and 1H NMR spectroscopy and single-crystal X-ray diffraction data. The thermal decomposition properties of cis and trans-HNS are

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13

Liu, Ying, Liutao Yang, Chunping Ma, and Yingzhe Zhang. "Thermal Behavior of Sweet Potato Starch by Non-Isothermal Thermogravimetric Analysis." Materials 12, no. 5 (2019): 699. http://dx.doi.org/10.3390/ma12050699.

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In this study, X-ray diffraction (XRD), thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC) methods were used to study the structure, the thermal degradation kinetics, and the thermogram of sweet potato starch, respectively. The thermal decomposition kinetics of sweet potato starch was examined within different heating rates in a nitrogen atmosphere. Different models of kinetic analysis were used to calculate the activation energies using the thermogravimetric data of the thermal degradation process. The activation energies got from Kissinger, Flynn–Wall–Ozawa, and Ša

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14

Mishra, M. K., and N. M. Misra. "Thermal Decomposition Kinetics of Labile Chromium Complex with Benzoic Acid." E-Journal of Chemistry 8, no. 2 (2011): 513–16. http://dx.doi.org/10.1155/2011/215012.

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Complex [CrO2(C7H5O2) C2H5OH) (H2O)2] was prepared by using benzoic acid. Its spectral characterization was done by using Elemental analysis (C and H), Inductively coupled plasma optical emission spectroscopy (ICP - OES), Ultraviolet - visible (UV-Vis) spectroscopy, Fourier transform infrared (FTIR) spectroscopy and Fast Atomic Bombardment (FAB) Mass spectrometry. Whereas thermal decomposition was investigated by differential scanning calorimetric (DSC). The low value of activation energy of exothermic change indicated lability of complex.

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15

Shi, Shuo, and Lin Shuang Zhao. "Effect of Humidity on the Thermal Stability of Red Pyrotechnic Composition." Advanced Materials Research 1030-1032 (September 2014): 52–55. http://dx.doi.org/10.4028/www.scientific.net/amr.1030-1032.52.

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pyrotechnic mixtures are sensitivity with the influence of humidity and are susceptible to explosive decompositions. The aim of this paper is to provide thermal decomposition data under different humidity conditions. The method of TG-DSC simultaneous analysis has been used to study the thermal decomposition mechanism of a typical red pyrotechnic mixture. The kinetic parameters were calculated by kissinger method. The thermal stability is evaluated by decomposition peak temperature (Tm), mass loss (△m) and activation energy (E), which shows that the decomposition peak temperature and activation

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16

Hongbo, Y., C. Meiling, W. Xu, and G. Hong. "Thermal Analysis On The Kinetics Of Magnesium-Aluminum Layered Double Hydroxides In Different Heating Rates." Archives of Metallurgy and Materials 60, no. 2 (2015): 1357–59. http://dx.doi.org/10.1515/amm-2015-0130.

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Abstract The thermal decomposition of magnesium-aluminum layered double hydroxides (LDHs) was investigated by thermogravimetry analysis and differential scanning calorimetry (DSC) methods in argon environment. The influence of heating rates (including 2.5, 5, 10, 15 and 20K/min) on the thermal behavior of LDHs was revealed. By the methods of Kissinger and Flynn-Wall-Ozawa, the thermal kinetic parameters of activation energy and pre-exponential factor for the exothermic processes under non-isothermal conditions were calculated using the analysis of corresponding DSC curves.

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17

Alves, Ricardo, Thaís Vitória da Silva Reis, Luis Carlos Cides da Silva, Silvia Storpírtis, Lucildes Pita Mercuri, and Jivaldo do Rosário Matos. "Thermal behavior and decomposition kinetics of rifampicin polymorphs under isothermal and non-isothermal conditions." Brazilian Journal of Pharmaceutical Sciences 46, no. 2 (2010): 343–51. http://dx.doi.org/10.1590/s1984-82502010000200022.

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The thermal behavior of two polymorphic forms of rifampicin was studied by DSC and TG/DTG. The thermoanalytical results clearly showed the differences between the two crystalline forms. Polymorph I was the most thermally stable form, the DSC curve showed no fusion for this species and the thermal decomposition process occurred around 245 ºC. The DSC curve of polymorph II showed two consecutive events, an endothermic event (Tpeak = 193.9 ºC) and one exothermic event (Tpeak = 209.4 ºC), due to a melting process followed by recrystallization, which was attributed to the conversion of form II to f

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18

Syguła, Ewa, Kacper Świechowski, Małgorzata Hejna, Ines Kunaszyk, and Andrzej Białowiec. "Municipal Solid Waste Thermal Analysis—Pyrolysis Kinetics and Decomposition Reactions." Energies 14, no. 15 (2021): 4510. http://dx.doi.org/10.3390/en14154510.

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In this study, 12 organic waste materials were subjected to TG/DTG thermogravimetric analysis and DSC calorimetric analysis. These analyses provided basic information about thermochemical transformations and degradation rates during organic waste pyrolysis. Organic waste materials were divided into six basic groups as follows: paper, cardboard, textiles, plastics, hygiene waste, and biodegradable waste. For each group, two waste materials were selected to be studied. Research materials were (i) paper (receipts, cotton wool); (ii) cardboard (cardboard, egg carton); (iii) textiles (cotton, leath

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19

Song, Jin Hong, Zhi Ming Zhou, and Shu Bo Wang. "Bis (2,2-Dinitroethyl-N-Nitro)Ethylenediamine-Based Energetic Salts and their Thermolysis Studies." Advanced Materials Research 781-784 (September 2013): 2458–62. http://dx.doi.org/10.4028/www.scientific.net/amr.781-784.2458.

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New energetic bis (2,2-dinitroethyl-N-nitro) ethylenediamine-based salts exhibiting reasonable physical properties, good detonation properties and relatively low impact sensitivities were synthesized in high yield by direct neutralization reactions. The thermal decomposition behavior of two new bis (2,2-dinitroethyl-N-nitro) ethylenediamine-based energetic salts was firstly measured using differential scanning calorimetry (DSC) at six different heating rates. The thermal decomposition kinetics and several thermodynamic parameters of the salts, such as apparent activation energy (E), pre-expone

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20

Song, Jia-xing, Tao Guo, Wen Ding, et al. "The Effect of Al Particles Size on the Thermal Behavior and Kinetics of Al-MnO2 Thermite System." Advances in Materials Science and Engineering 2020 (May 7, 2020): 1–11. http://dx.doi.org/10.1155/2020/3097404.

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Micron-MnO2 powder has unique thermal decomposition process compared with other metal oxides, and the different characteristics of components in thermite could affect the thermal performance of the whole system directly. In this work, the Al powder with different three particle sizes was combined with micron-MnO2 to prepare the Al-MnO2 thermite system, and the effect of Al powder particle sizes on the whole thermal behavior was studied. Firstly, the thermal decomposition process of micron-MnO2 and purity of Al powder are tested by TG-DSC. By using ultrasonic dispersion method, the fuel-rich th

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21

Vala, Masoud Mohamadi, Yadollah Bayat, and Mohammad Bayat. "Synthesis and Thermal Decomposition Kinetics of Epoxy Poly Glycidyl Nitrate as an Energetic Binder." Defence Science Journal 70, no. 4 (2020): 461–68. http://dx.doi.org/10.14429/dsj.70.15470.

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An energetic binder epoxy poly glycidyl nitrate (e-PGN) with a molecular weight of about 1244 gr/mol was synthesised via end modified poly glycidyl nitrate (PGN) is presented in the paper. This structure was characterised by the number of epoxy groups, infrared spectroscopy, and nuclear magnetic resonance. The thermal degradation behavior of e-PGN was studied by thermo gravimetric analysis (TG) and differential scanning calorimetry (DSC) under nitrogen atmosphere at different heating rates. The glass transition temperature (Tg) was measured to determine the compatibility of energetic plasticiz

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22

Nisar, Jan, Mudassir Iqbal, Munawar Iqbal, et al. "Decomposition Kinetics of Levofloxacin: Drug-Excipient Interaction." Zeitschrift für Physikalische Chemie 234, no. 1 (2020): 117–28. http://dx.doi.org/10.1515/zpch-2018-1273.

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AbstractThe present study is focused on the thermal decomposition of Levofloxacin in the absence and presence of different excipients (sodium starch glycolate, magnesium stearate, microcrystalline cellulose and lactose using Thermogravimetry (TG). Fourier Transform Infra Red Spectroscopy (FTIR) and Differential Scanning Calorimetry (DSC) were used to study the possible drug – excipient interaction. It has been shown that the interaction of the first three excipients (sodium starch glycolate, magnesium stearate, and microcrystalline cellulose) with Levofloxacin is physical in nature. Lactose wa

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23

Zhu, Yan-Li, Hao Huang, Hui Ren, and Qing-Jie Jiao. "Kinetics of Thermal Decomposition of Ammonium Perchlorate by TG/DSC-MS-FTIR." Journal of Energetic Materials 32, no. 1 (2013): 16–26. http://dx.doi.org/10.1080/07370652.2012.725453.

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24

Zhu, Yan-Li, Ming-Xin Shan, Zhi-Xia Xiao, Jing-Si Wang та Qing-Jie Jiao. "Kinetics of thermal decomposition of ε-hexanitrohexaazaisowurtzitane by TG-DSC-MS-FTIR". Korean Journal of Chemical Engineering 32, № 6 (2015): 1164–69. http://dx.doi.org/10.1007/s11814-014-0305-y.

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25

Jinno, D., Ashwani K. Gupta, and K. Yoshikawa. "Determination of Chemical Kinetic Parameters of Surrogate Solid Wastes." Journal of Engineering for Gas Turbines and Power 126, no. 4 (2004): 685–92. http://dx.doi.org/10.1115/1.1772407.

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Results on the thermal decomposition behavior of several important components in solid wastes are presented under controlled chemical and thermal environments. Thermogravimetry (TGA) tests were conducted on the decomposition of cellulose, polyethylene, polypropylene, polystyrene and polyvinyl chloride in inert (nitrogen), and oxidative (air) atmospheres. Inert condition tests were performed at heating rates of 5, 10, 30, and 50°C/min while the oxidative condition tests were performed at one heating rate of 5°C/min. Differential scanning calorimetry (DSC) was also used to measure the heat flow

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26

Liu, Xiaoxu, Xiaowen Liu, and Yuehua Hu. "Investigation of the thermal behaviour and decomposition kinetics of kaolinite." Clay Minerals 50, no. 2 (2015): 199–209. http://dx.doi.org/10.1180/claymin.2015.050.2.04.

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AbstractPrevious work on the structural and thermal properties of various types of kaolinite have led to different conclusions, rendering comparison of analytical results difficult. The objectives of the present study were to investigate the thermal behaviour of kaolinite and to carry out a kinetic analysis of the decomposition of kaolinite at high temperatures. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and thermogravimetry-differential scanning calorimetry (TG-DSC) were used to study the mechanism of the thermal decomposition. The modified Coats–Redfern, Friedman

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27

Zhang, Jiao-Qiang, Yun-Long Xu, Qian Jia, et al. "Nonisothermal decomposition and safety parameters of HNIW/TNT cocrystal." RSC Advances 8, no. 54 (2018): 31028–36. http://dx.doi.org/10.1039/c8ra06143b.

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28

Liu, Jianguo, Zhentao An, Qian Zhang, and Chaoyang Wang. "Thermal Decomposition of Hydroxylamine Nitrate Studied by Differential Scanning Calorimetry Analysis and Density Functional Theory Calculations." Progress in Reaction Kinetics and Mechanism 42, no. 4 (2017): 334–43. http://dx.doi.org/10.3184/146867817x14954764850351.

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The thermal stability and kinetics of hydroxylamine nitrate (HAN) decomposition were studied by differential scanning calorimetry (DSC) and the thermal decomposition reaction mechanism was determined by density functional theory (DFT). With the help of parameter values from the non-isothermal DSC curves of HAN, the thermal decomposition activation energy and pre-exponential constant were obtained by the Kissinger and Ozawa methods. Then, the most probable mechanism function was calculated by the Šatava–Šesták method. Seven different paths for the thermal decomposition mechanism of HAN were for

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Yuan, Min-Hao, Chi-Min Shu, and Arcady A. Kossoy. "Kinetics and hazards of thermal decomposition of methyl ethyl ketone peroxide by DSC." Thermochimica Acta 430, no. 1-2 (2005): 67–71. http://dx.doi.org/10.1016/j.tca.2004.12.006.

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Huang, Run, Xuewei Lv, Cheng Pan, Donghai Li, and E. Enguangguo. "Kinetics of the decomposition reaction of phosphorite concentrate." Chemical Industry and Chemical Engineering Quarterly 20, no. 2 (2014): 215–21. http://dx.doi.org/10.2298/ciceq121023002h.

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Apatite is the raw material, which is mainly used in phosphate fertilizer, and part are used in yellow phosphorus, red phosphorus, and phosphoric acid in the industry. With the decrease of the high grade phosphorite lump, the agglomeration process is necessary for the phosphorite concentrate after beneficiation process. The decomposition behavior and the phase transformation are of vital importance for the agglomeration process of phosphorite. In this study, the thermal kinetic analysis method was used to study the kinetics of the decomposition of phosphorite concentrate. The phosphorite conce

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31

Xue-ying, Wu, Wang Ya-zhen, Di Yu-tao, Lan Tian-yu, and Zu Li-wu. "Preparation and Thermal Decomposition Kinetics of Novel Silane Coupling Agent with Mercapto Group." Journal of Nanomaterials 2019 (December 18, 2019): 1–9. http://dx.doi.org/10.1155/2019/6089065.

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Using carbon disulfide and 3-aminopropyltriethoxysilane as raw materials, a novel silane coupling agent with a terminal group was synthesized for the first time. The compound was synthesized in two steps in ethanol water solvent under the action of the catalyst triethylamine and a sulfhydryl-protecting agent. The product was characterized by FT-IR, 1H NMR, and mass spectra to determine and prove its structure. The best experimental scheme was explored by a single factor experiment: a thiol-protecting agent selected iodomethane, the total reaction time was 2 hours, the two-step reaction tempera

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Daneluti, André Luis Máximo, and Jivaldo do Rosário Matos. "Study of thermal behavior of phytic acid." Brazilian Journal of Pharmaceutical Sciences 49, no. 2 (2013): 275–83. http://dx.doi.org/10.1590/s1984-82502013000200009.

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Phytic acid is a natural compound widely used as depigmenting agent in galenic cosmetic emulsions. However, we have observed experimentally that phytic acid, when heated to 150 ºC for around one hour, shows evidence of thermal decomposition. Few studies investigating this substance alone with regard to its stability are available in the literature. This fact prompted the present study to characterize this species and its thermal behavior using thermal analysis (TG/DTG and DSC) and to associate the results of these techniques with those obtained by elemental analysis (EA) and absorption spectro

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He, Xiao Fang, Chang Wen Miao, Yong Hao Wu, Xin Xin Cao, and Dan Liu. "Thermal Reaction Kinetics of Fly Ash Cement Paste at the Age of 28 Days." Applied Mechanics and Materials 668-669 (October 2014): 91–94. http://dx.doi.org/10.4028/www.scientific.net/amm.668-669.91.

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The thermal reaction kinetics of fly ash cement pastes were studied by Differential Scanning Calorimetry (DSC) and Thermal Gravity Analysis-Differential Thermal Gravity (TG-DTG) method, the kinetics parameters such as apparent activation energy was calculated by the Kissinger method, and the physical parameters were obtained. The result show that the fly ash cement pastes performance three endothermic reaction stages at different heating rates, peak temperatures of each stage at the range of 91.85~121.08°C, 453.93~496.48°C, and 680.21~751.62°C. TG-DTG show there were three thermal decompositio

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34

Lin, Chun Ping, Yi Ming Chang, Jo Ming Tseng, and Mei Li You. "Comparison of the Isothermal and Non-Isothermal Kinetics for Predicting the Thermal Hazard of Tert-Butyl Peroxybenzoate." Advanced Materials Research 328-330 (September 2011): 124–27. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.124.

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Tert-butyl peroxybenzoate (TBPB), a liquid organic peroxide, has been widely employed in the petrifaction industry as a polymerization formation agent. This study investigated the thermokinetic parameters of TBPB by isothermal kinetic algorithms and non-isothermal kinetic equations, using thermal activity monitor III (TAM III) and differential scanning calorimetry (DSC), respectively. Simulations of 0.5 L, 25 kg, 55 gallon, and 400 kg reactors in liquid thermal explosion models were performed. It is based on the thermal hazard properties, such as the heat of decomposition (∆Hd), activation ene

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FARHAN, Ahmed Jadah. "STUDY OF THE KINETICS OF THERMAL DEGRADATION OF UNSATURATED POLYESTER AND POLYESTER/ SILICA NANOPARTICLES COMPOSITES BY TGA AND DSC ANALYSIS TECHNIQUES." Periódico Tchê Química 17, no. 35 (2020): 437–48. http://dx.doi.org/10.52571/ptq.v17.n35.2020.38_farhan_pgs_437_448.pdf.

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Composites are multi-phase materials that have superior engineering properties; the combination of their constituent phases achieves these properties. Nanoparticle-reinforced polymeric composites (NPCs) are new types of composites that have attracted a lot of attention recently and rapidly emerging as a multidisciplinary research activity whose results could widen the applications of polymers to the benefit of many different industries. The aim of research to analyze the effect of adding different percentages (10, 20, and 30%) of silica nanoparticles into unsaturated polyester (UPE) and identi

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Tarani, Evangelia, Klementina Pušnik Črešnar, Lidija Fras Zemljič, et al. "Cold Crystallization Kinetics and Thermal Degradation of PLA Composites with Metal Oxide Nanofillers." Applied Sciences 11, no. 7 (2021): 3004. http://dx.doi.org/10.3390/app11073004.

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Poly(lactic acid) (PLA) nanocomposites with antimicrobial fillers have been increasingly explored as food packaging materials that are made of a biobased matrix and can minimize food loss due to spoilage. Some of the most commonly studied fillers are zinc oxide (ZnO), titanium dioxide (TiO2), and silver nanoparticles (AgNPs). In this work, nanocomposites with 1 wt.% of each filler were prepared by melt mixing. An extensive study of thermally stimulated processes such as crystallization, nucleation, degradation, and their kinetics was carried out using Differential Scanning Calorimetry (DSC) an

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Yao, Xin Ding, Rui Na Fang, Hong Jian Pang, Zong Wu Wang, and Guo Ji Liu. "Preparation and Non-Isothermal Kinetics Analysis of N-[(4-Bromo-3,5-Difluorine)Phenyl]acrylamide." Advanced Materials Research 781-784 (September 2013): 580–84. http://dx.doi.org/10.4028/www.scientific.net/amr.781-784.580.

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N-[(4-bromo-3,5-difluorine) phenyacrylamide was synthesized first time by the interaction of 4-Bromo-3,5-difluoroaniline with acryloyl chloride in presence of triethylamine. The compound behavior was investigated using TG and DSC techniques under non-isothermal linear regime. The non-isothermal kinetic data were analyzed with the Achar equation, Coats-Redfern equation,Kissinger equation, Flynn-Wall-Ozawa equation and Starink equation. The mechanism function and kinetic parameters of the thermal decomposition were obtained. The chemical reaction mechanism (F3) controlled the decomposition proce

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Salama, Nahla N., Mohammed A. El Ries, Safaa Toubar, Maha Abd El Hamid, and Mohammed I. Walash. "Thermoanalytical Investigation of Some Sulfone-Containing Drugs." Journal of Analytical Methods in Chemistry 2012 (2012): 1–9. http://dx.doi.org/10.1155/2012/439082.

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The thermal behavior of some sulfone-containing drugs, namely, dapsone (DDS), dimethylsulfone (MSM), and topiramate (TOP) in drug substances, and products were investigated using different thermal techniques. These include thermogravimetry (TGA), derivative thermogravimetry (DTG), differential thermal analysis (DTA), and differential scanning calorimetry (DSC). The thermogravimetric data allowed the determination of the kinetic parameters: activation energy (Ea), frequency factor (A), and reaction order (n). The thermal degradation of dapsone and topiramate was followed a first-order kinetic b

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Ke, Wu, Wang Rumin, and Zeng Jinfang. "Curing Kinetics of Hybrid Networks Composed of Benzoxazine and Multifunctional Novolac Epoxy." International Journal of Polymer Science 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/629403.

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A novel hybrid network composed of benzoxazines (BZ) and novolac epoxy resin (F-51) was prepared successfully. Thermal properties, curing kinetics, and decomposition process were studied using isothermal differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) in this paper. The reactive mechanism of F-51/BZ mixture system is different from the BZ homopolymers at low temperatures; two resin systems follow the autocatalytic model mainly at high temperatures. Thermogravimetric analysis indicates that F-51 can have no significant effect on thermal degradation temperatures and

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Fischer, Thomas S., Norbert Eisenreich, and Achim Pfeil. "Kinetic parameters of the thermal decomposition of trimethylindium by DSC." Thermochimica Acta 339, no. 1-2 (1999): 35–40. http://dx.doi.org/10.1016/s0040-6031(99)00295-6.

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Liavitskaya, Tatsiana, and Sergey Vyazovkin. "All You Need to Know about the Kinetics of Thermally Stimulated Reactions Occurring on Cooling." Molecules 24, no. 10 (2019): 1918. http://dx.doi.org/10.3390/molecules24101918.

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In this tutorial overview article the authors share their original experience in studying the kinetics of thermally stimulated reactions under the conditions of continuous cooling. It is stressed that the kinetics measured on heating is similar to that measured on cooling only for single-step reactions. For multi-step reactions the respective kinetics can differ dramatically. The application of an isoconversional method to thermogravimetry (TGA) or differential scanning calorimetry (DSC) data allows one to recognize multi-step kinetics in the form of the activation energy that varies with conv

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Wen, Pu Hong. "Kinetic Investigation of Thermal Decomposition Reactions of 4'-Demethypodophyllotoxin and Podophyllotoxin." Advanced Materials Research 800 (September 2013): 517–21. http://dx.doi.org/10.4028/www.scientific.net/amr.800.517.

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The thermal behavior and thermal decomposition kinetic parameters of podophyllotoxin (PPT) and 4-demethypodophyllotoxin (DMPPT) in a temperature-programmed mode have been investigated by means of DSC and TG-DTG. The kinetic model functions in differential and integral forms of the thermal decomposition reactions mentioned above for leading stage were established. The kinetic parameters of the apparent activation energy Ea and per-exponential factor A were obtained from analysis of the TG-DTG curves by integral and differential methods. The most probable kinetic model function of both decomposi

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Li, Kai Feng, Peng Fu, Chuan Lin Liu, Qing Xiang Zhao, and Min Ying Liu. "Synthesis, Characterization and Isothermal Crystallization Kinetics of Poly(Dodecamethylene Terephthalamide)." Advanced Materials Research 284-286 (July 2011): 1894–900. http://dx.doi.org/10.4028/www.scientific.net/amr.284-286.1894.

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A kind of semi-aromatic polyamide, poly(dodecamethylene terephthalamide) (PA12T) was synthesized via a three-step reaction of terephthalic acid and 1,12-dodecanediamine. The structure of the prepared PA12T was characterized by Fourier transform infrared (FT-IR) spectroscopy and proton nuclear magnetic resonance (1H-NMR). The thermal behaviour of PA12T was determined by differential scanning calorimetry (DSC), thermo-gravimetric analysis (TGA) and dynamic mechanical analysis (DMA). Melting temperature (Tm), glass transition temperature (Tg) and decomposition temperature (Td) of PA12T are 311°C,

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Zhang, Qiuli, Min Luo, Long Yan, Aiwu Yang, and Xiangrong Hui. "Kinetic Analysis of Low-Rank Coal Pyrolysis by Model-Free and Model-Fitting Methods." Journal of Chemistry 2019 (November 11, 2019): 1–7. http://dx.doi.org/10.1155/2019/9075862.

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Coal SJC, coal WJG, coal ZJM, and coal HCG were selected to investigate the pyrolysis kinetics of northern Shaanxi coals. TG and DSC experiments of four coals were carried out with a synchronous thermal analyzer at heating rates 5, 10, 15, and 20 C/min, respectively. The pyrolysis characteristics were described by thermogravimetric data, and the kinetic parameters were calculated by Flynn–Wall–Ozawa (FWO), Kissinger, general integration, and MacCallum–Tanner methods. The results show that coal SJC, coal ZJM, and coal HCG all conform to the reaction series equation, the thermal decomposition re

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Supriya, N., Korah Bina Catherine, and R. Rajeev. "DSC-TG studies on kinetics of curing and thermal decomposition of epoxy–ether amine systems." Journal of Thermal Analysis and Calorimetry 112, no. 1 (2012): 201–8. http://dx.doi.org/10.1007/s10973-012-2805-5.

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Lozano, R., J. Roman, F. De Jesus, A. Jerez, M. Gaitan, and E. Ramos. "Kinetic studies by DSC on the thermal decomposition of calcium oxalate." Thermochimica Acta 143 (May 1989): 93–100. http://dx.doi.org/10.1016/0040-6031(89)85045-2.

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Wen, Pu Hong. "Kinetic Investigation of Thermal Decomposition Reactions of Podophyllic Acid and Picropodophyllic Acid." Advanced Materials Research 391-392 (December 2011): 1230–34. http://dx.doi.org/10.4028/www.scientific.net/amr.391-392.1230.

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The thermal behavior and thermal decomposition kinetic parameters of podophyllic acid and picropodophyllic acid in a temperature-programmed mode have been investigated by means of DSC and TG-DTG. The kinetic model functions in differential and integral forms of the thermal decomposition reactions mentioned above for leading stage were established. The kinetic parameters of the apparent activation energy Ea and per-exponential factor A were obtained from analysis of the TG-DTG curves by integral and differential methods. The most probable kinetic model function of the decomposition reaction in

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Bhesaniya, Kapil, Ashish Patel, and Shipra Baluja. "Determination of Kinetic Parameters of Decomposition of Tetrahydropyrimidine Derivatives." International Letters of Chemistry, Physics and Astronomy 18 (September 2013): 23–32. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.18.23.

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Some new tetrahydropyrimidine derivatives have been synthesized and their structural determination was done by IR, NMR and mass spectral data. Thermal analysis of these synthesized dihydropyrimidinthiones has been carried out by TGA and DSC techniques. From the thermograms, various kinetic parameters such as order of degradation (n), energy of activation (E), frequency factor (A) and entropy change (ΔS) have been evaluated. Further, thermal stability of tetrahydropyrimidine have been determined which is found to depend on the type of substituent present in the compounds.

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Koul, R. K., Shivani Suri, Vishal Singh, and K. K. Bamzai. "Synthesis, Characterization, and Thermal Kinetics of Mixed Gadolinium: Calcium Heptamolybdate System." International Scholarly Research Notices 2014 (October 20, 2014): 1–9. http://dx.doi.org/10.1155/2014/141463.

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Synthesis of mixed gadolinium calcium heptamolybdate (GdCaHM) system in silica gel medium using single gel single tube technique has been successfully achieved. The grown crystal exhibits various morphologies, which includes spherulites, multifaceted, and square platelets. The nature of the grown material was established by X-ray diffraction (XRD) studies. Fourier transform infrared spectroscopy (FTIR) study signifies the presence of heptamolybdate (Mo7O24) and water symmetry structure, whereas energy dispersive X-ray analysis (EDAX) establishes the stoichiometric of the grown crystal as GdCaM

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Masoud, Mamdouh S., Magda F. Fathalla, Rabah Hanem A. Mohamed, and Maisa S. Hassan. "Spectral and Thermal Studies of Some Nucleic Acid Complexes." Asian Journal of Chemistry 31, no. 3 (2019): 733–43. http://dx.doi.org/10.14233/ajchem.2019.21515.

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Barbituric acid, thiobarbituric acid and thiouracil complexes with sodium and potassium chlorides were prepared and characterized by UV in different solvents and IR experimentally and theoretically using B3LYP method and Gaussian program. The composition of the studied complexes was also confirmed by elemental and thermal analysis, TG, DTA and DSC techniques to determine thermodynamic parameters (Ea, ΔH, ΔS and ΔG). The negative value of entropy of activation indicated the fragments have ordered structures than undecomposed complexes. The positive values of enthalpy of activation of the decomp

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