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You searched for: Subject "differential scanning calorimetry" Remove constraint Subject: "differential scanning calorimetry"
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1. The machine learning method for overlapping peak decompositions in differential scanning calorimetry

Author:
Tao Li; Shuo-Xun Zhang; Hai-Han Huang; Wen-Ming Chen
Source:
Thermochimica acta 2022 v.708 pp. 179123
ISSN:
0040-6031
Subject:
differential scanning calorimetry,   etc   ; area; artificial intelligence; chemical composition; degradation; exhibitions; models;     Show all 7 Subjects
Abstract:
... An overlapping peak resolving (OPR) method based on the machine learning theory is developed to identify the independent peaks constituting the overlapping peaks in differential scanning calorimetry. The content prediction model (CPM) is presented to analyze the contents of the chemical constituents by decomposing the overlapping peaks and establishing the relationship between the contents and pea ...
DOI:
10.1016/j.tca.2021.179123

2. Unexpected Structural Properties in the Saturation Region of the Odd–Even Effects in Aliphatic Polyethers: Influence of Crystallization Conditions

Author:
Irma Flores; Ricardo A. Pérez-Camargo; Elena Gabirondo; Maria Rosaria Caputo; Guoming Liu; Dujin Wang; Haritz Sardon; Alejandro J. Müller
Source:
Macromolecules 2022 v.55 no.2 pp. 584-594
ISSN:
1520-5835
Subject:
differential scanning calorimetry,   etc   ; X-ray scattering; crystallization; exhibitions; history; length; melting; sampling; solutions; temperature;     Show all 10 Subjects
Abstract:
... A series of aliphatic polyethers with different chain lengths (nCH₂ = 6 to 12 and 16) is studied employing differential scanning calorimetry and X-rays scattering. The calorimetric and structural behavior of samples crystallized from the melt is divided into the odd–even and saturation regions. In the odd–even region (nCH₂ = 6 to 10), the odd samples (nCH₂ = 7 and 9) show enhanced calorimetric pro ...
DOI:
10.1021/acs.macromol.1c02235

3. Effect of lipids complexes on controlling ethylene gas release from V-type starch

Author:
Zhanpeng Liu; Shaokang Wang; Chin Ping Tan; Bin Zhang; Xiong Fu; Qiang Huang
Source:
Carbohydrate polymers 2022 v.291 pp. 119556
ISSN:
0144-8617
Subject:
differential scanning calorimetry,   etc   ; acids; coconut oil; confocal laser scanning microscopy; ethylene production; granules; lipids; polymers; starch granules; surfaces;     Show all 10 Subjects
Abstract:
... In this study, the effects of n-decanoic acid (n-CA) or coconut oil (CCN) on the release of ethylene from V-type starch (VS) were investigated. Results of differential scanning calorimetry showed that adding n-CA or CCN into VS generated a starch–lipid complex. Results of scanning electron microscopy and confocal laser scanning microscopy indicated that VS granules aggregated but oil films appeare ...
DOI:
10.1016/j.carbpol.2022.119556

4. Unraveling molecular interactions in whey protein-kefiran composite films to understand their physicochemical and mechanical properties

Author:
Nina Gagliarini; Cecilia B. Figoli; Judith Piermaria; Alejandra Bosch; Analía G. Abraham
Source:
Food bioscience 2022 v.50 pp. 102012
ISSN:
2212-4292
Subject:
differential scanning calorimetry,   etc   ; Fourier transform infrared spectroscopy; denaturation; heat treatment; modulus of elasticity; opacity; plasticizers; temperature; tensile strength; water activity; water content; whey; whey protein;     Show all 13 Subjects
Abstract:
... To enhance health promoting properties of edible whey protein films, the inclusion of kefiran to develop composite films was studied. Physicochemical and mechanical properties of films prepared with different wpi:kefiran ratios, different percentage of plasticizer and subjected or not to a heat treatment were analyzed. The inter- and intra-molecular interactions produced by the incorporation of ke ...
DOI:
10.1016/j.fbio.2022.102012

5. Stuffed pumpkins: mechanochemical synthesis of host–guest complexes with cucurbit[7]uril

Author:
Martin Dračínský; Carina Santos Hurtado; Eric Masson; Jiří Kaleta
Source:
Chemical communications 2021 v.57 no.17 pp. 2132-2135
ISSN:
1364-548X
Subject:
differential scanning calorimetry,   etc   ; chemical communication; mechanochemistry; models; pumpkins; solubility;     Show all 6 Subjects
Abstract:
... Solvent-free mechanochemical synthesis (ball-milling) was used to prepare inclusion complexes with cucurbit[7]uril and four model guest molecules (adamantane, adamantyl-1-amine hydrochloride, toluidine hydrochloride, and p-phenylenediamine dihydrochloride). Successful formation of individual inclusions was independently confirmed by one- and two-dimensional solid-state NMR techniques and different ...
DOI:
10.1039/d1cc00240f

6. Influence of curing processes on the development of fiber bridging during delamination in composite laminates

Author:
Ping Hu; Ditho Pulungan; Ran Tao; Gilles Lubineau
Source:
Composites 2021 v.149 pp. 106564
ISSN:
1359-835X
Subject:
differential scanning calorimetry,   etc   ; composite materials; core sampling; delamination; testing; thickness; variance;     Show all 7 Subjects
Abstract:
... Fiber bridging can significantly influence the interlaminar toughness of laminated composites. However, very little is known about to what extent it depends on the processing conditions. In this paper, we performed a back-bonded double cantilever beam (BB-DCB) test to study the curing process influence on the development of fiber bridging for composite laminates with various thicknesses. The BB-DC ...
DOI:
10.1016/j.compositesa.2021.106564

7. Comparison of Pyrolysis Properties of Extruded and Cast Poly(methyl methacrylate)

Author:
Gregory J. Fiola; Dushyant M. Chaudhari; Stanislav I. Stoliarov
Source:
Fire safety journal 2021 v.120 pp. 103083
ISSN:
0379-7112
Subject:
differential scanning calorimetry,   etc   ; algorithms; manufacturing; models; molecular weight; polymethylmethacrylate; pyrolysis; thermogravimetry;     Show all 8 Subjects
Abstract:
... Poly (methyl methacrylate) (PMMA) has long been a benchmark material of study in the fire research and fire modeling community due to its simple and predictable thermal decomposition behavior. Two common PMMA manufacturing processes, casting and extruding, produce polymers with slightly different properties and characteristics, primarily a result of differences in molecular mass. A dichotomy has b ...
DOI:
10.1016/j.firesaf.2020.103083

8. Energetics of tetradentate N2O2 schiff bases containing different alkyldiimine brigdes

Author:
Ana L.R. Silva; Jorge M. Gonçalves; Victor M.F. Morais; Maria D.M.C. Ribeiro da Silva
Source:
Thermochimica acta 2021 v.695 pp. 178817
ISSN:
0040-6031
Subject:
differential scanning calorimetry,   etc   ; chemical structure; enthalpy; hydroxybenzaldehyde; ligands; quantum mechanics; schiff bases; thermal properties;     Show all 8 Subjects
Abstract:
... This work is part of a comprehensive study of the thermal properties of several molecules of tetradentate Schiff bases, obtained as condensation products of salicylaldehyde with alkyldiamines. Herein, we report an experimental thermochemical study of SALPN (N,N′-bis(salicylaldehydo)propylenediimine) and a computational thermochemical study of SALEN (N,N′-bis(salicylaldehydo)dimethylenediimine), SA ...
DOI:
10.1016/j.tca.2020.178817

9. Ligand binding to natural and modified human serum albumin

Author:
Matthew W. Eskew; Megan M. Koslen; Albert S. Benight
Source:
Analytical biochemistry 2021 v.612 pp. 113843
ISSN:
0003-2697
Subject:
differential scanning calorimetry,   etc   ; biotinylation; chemical structure; human serum albumin; ligands; pH; paper; quantitative analysis; thermodynamics;     Show all 9 Subjects
Abstract:
... This paper reports evaluation of ligand binding constants for unmodified or biotinylated HSA (HSAB) for two well-known HSA binding ligands, naproxen and bromocresol green. Results demonstrate differential scanning calorimetry (DSC) is a reliable quantitative method for straight-forward and rapid evaluation of ligand binding constants for HSA and modified derivatives. DSC measured the thermodynamic ...
DOI:
10.1016/j.ab.2020.113843

10. Curing behavior studies of phenol-containing phthalonitrile monomer for advanced composite materials

Author:
Hanqi Zhang; Bing Wang; Jiqiang Hu; Dongqing Wang; Yajun Zou; Yongsheng Yang
Source:
Thermochimica acta 2021 v.696 pp. 178837
ISSN:
0040-6031
Subject:
differential scanning calorimetry,   etc   ; accuracy; activation energy; behavior; composite materials; equations; mathematical models; phenol; polymers; regression analysis; temperature;     Show all 11 Subjects
Abstract:
... Phenol-containing phthalonitrile polymer is a novel type of autocatalytic phthalonitrile thermoset with outstanding thermal performance. In this work, the curing behavior of phenol-containing phthalonitrile monomer was studied by differential scanning calorimetry. Based on the isoconversional principle, the activation energy was calculated as 63±6 kJ/mol. It is significantly lower than the reporte ...
DOI:
10.1016/j.tca.2020.178837

11. Standard enthalpies of formation of N,N′-(1,3-phenylene)bis(phthalimide) and N,N′-(1,3-phenylene)bis(phthalimide-5-carboxilic acid)

Author:
Karina Salas-López; Miguel A. García-Castro; Patricia Amador; Ana M. Herrera-González; Alberto Galicia-Aguilar; Francisco A. Amador; Fernanda Hernández-Pascasio; Henoc Flores
Source:
Thermochimica acta 2021 v.697 pp. 178861
ISSN:
0040-6031
Subject:
differential scanning calorimetry,   etc   ; combustion; degradation; energy; enthalpy; estimation; heat; mechanochemistry; mole fraction; phthalimide; purity; solvents; sublimation; temperature; thermogravimetry;     Show all 15 Subjects
Abstract:
... N,N′-(1,3-phenylene)bis(phthalimide) and N,N′-(1,3-phenylene)bis(phthalimide-5-carboxilic acid), were synthetized in solid phase without solvents, using mechanochemistry; the first compound could be purified with a high mole fraction. However, it was not possible to obtain the second with high purity. The thermochemical properties of compound N,N′-(1,3-phenylene)bis(phthalimide) were determined fr ...
DOI:
10.1016/j.tca.2021.178861

12. Isothermal and non-isothermal crystallization kinetics of novel metalloid-bearing light rare-earth-based La64Al26Ga4C6 metallic glass with high thermal stability

Author:
Tao Xu; Zengyun Jian; Longchao Zhuo; Leilei Zhang; Fange Chang; Man Zhu; Yongqin Liu; Ziqi Jie
Source:
Thermochimica acta 2021 v.697 pp. 178858
ISSN:
0040-6031
Subject:
differential scanning calorimetry,   etc   ; activation energy; crystallization; equations; glass; glass transition; kinetics; light; metalloids; rare earth elements; temperature; thermal stability;     Show all 12 Subjects
Abstract:
... The crystallization kinetics of a novel metalloid-bearing light rare-earth (RE)-based La₆₄Al₂₆Ga₄C₆ metallic glass (MG) under isothermal and non-isothermal conditions were systematically researched by Johnson-Mehl-Avrami (JMA), Arrhenius, Kissinger, Ozawa, Kissinger-Akahira-Sunose and Ozawa-Flynn-Wall approaches using differential scanning calorimeter. The present MG possesses higher thermal stabi ...
DOI:
10.1016/j.tca.2020.178858

13. Hybrid giant lipid vesicles incorporating a PMMA-based copolymer

Author:
Ylenia Miele; Anne-Françoise Mingotaud; Enrico Caruso; Miryam C. Malacarne; Lorella Izzo; Barbara Lonetti; Federico Rossi
Source:
Biochimica et biophysica acta 2021 v.1865 no.4 pp. 129611
ISSN:
0304-4165
Subject:
differential scanning calorimetry,   etc   ; composite polymers; droplets; electron transfer; fluorescence microscopy; image analysis; lipids; nuclear magnetic resonance spectroscopy; permeability; polymethylmethacrylate; temperature;     Show all 11 Subjects
Abstract:
... In recent years, there has been a growing interest in the formation of copolymer-lipid hybrid self-assemblies, which allow combining and improving the main features of pure lipid-based and copolymer-based systems known for their potential applications in the biomedical field. As the most common method used to obtain giant vesicles is electroformation, most systems so far used low Tg polymers for t ...
DOI:
10.1016/j.bbagen.2020.129611

14. Thermal decomposition kinetics of three anthraquinone hazardous waste

Author:
Ze Yuan Xia; Wen Qian Wu; Wang Hua Chen; Li Ping Chen; Zi Chao Guo
Source:
Thermochimica acta 2021 v.697 pp. 178852
ISSN:
0040-6031
Subject:
differential scanning calorimetry,   etc   ; activation energy; anthraquinones; dyes; hazardous waste; kinetics; melting; models; nitro compounds; prediction; risk; specific heat; temperature; thermal degradation;     Show all 14 Subjects
Abstract:
... Anthraquinone nitro compounds are the important intermediate and hazardous waste in dye production. In order to understand the thermal decomposition characteristics of three typical dye wastes: 1-nitroanthraquinone, 1,5-dinitroanthraquinone and 1,8-dinitroanthraquinone, the dynamic and isothermal experiments were conducted by differential scanning calorimeter. The dynamic results indicate that the ...
DOI:
10.1016/j.tca.2020.178852

15. Thermal decomposition of ammonium nitrate on rust surface: Risk of low-temperature fire

Author:
Ibukun Oluwoye; Sara Mosallanejad; Goruck Soubans; Mohammednoor Altarawneh; Jeff Gore; Bogdan Z. Dlugogorski
Source:
Fire safety journal 2021 v.120 pp. 103063
ISSN:
0379-7112
Subject:
differential scanning calorimetry,   etc   ; X-ray diffraction; activation energy; ammonium nitrate; ferric oxide; infrared spectroscopy; iron; molecular models; steel; temperature; thermal degradation; thermogravimetry;     Show all 12 Subjects
Abstract:
... Ammonium nitrate (AN, NH₄NO₃) remains classified as an oxidising agent for transport, storage and handling purposes. The safe use of ammonium nitrate requires strict procedures as AN is incompatible with many materials. This study investigates the thermal decomposition of AN on surfaces of rust, potentially present on steel in storage facilities of AN. Infrared spectroscopy and X-ray diffraction s ...
DOI:
10.1016/j.firesaf.2020.103063

16. Experimental phase diagram study of the binary KCl-Na2CO3 system

Author:
P. Haseli; R. Jacob; M. Liu; P. Majewski; F.C. Christo; F. Bruno
Source:
Thermochimica acta 2021 v.695 pp. 178811
ISSN:
0040-6031
Subject:
differential scanning calorimetry,   etc   ; energy-dispersive X-ray analysis; information; latent heat; melting point; models; occurrence; physical phases; scanning electron microscopy; solidification; temperature;     Show all 11 Subjects
Abstract:
... The phase diagram of the KCl-Na₂CO₃ system was experimentally investigated for the complete range of compositions using differential scanning calorimetry (DSC). The results are in excellent agreement with the phase diagram that is computed by the two-sublattice models. Both DSC experimental curves and the Tammann diagram were used to determine the eutectic point and the results were compared. The ...
DOI:
10.1016/j.tca.2020.178811

17. Efficiency of liquid tin(ii) n-alkoxide initiators in the ring-opening polymerization of l-lactide: kinetic studies by non-isothermal differential scanning calorimetry

Author:
Montira Sriyai; Tawan Chaiwon; Robert Molloy; Puttinan Meepowpan; Winita Punyodom
Source:
RSC advances 2020 v.10 no.71 pp. 43566-43578
ISSN:
2046-2069
Subject:
differential scanning calorimetry,   etc   ; activation energy; data analysis; liquids; polymerization; tin;     Show all 6 Subjects
Abstract:
... Novel soluble liquid tin(ii) n-butoxide (Sn(OnC₄H₉)₂), tin(ii) n-hexoxide (Sn(OnC₆H₁₃)₂), and tin(ii) n-octoxide (Sn(OnC₈H₁₇)₂) initiators were synthesized for use as coordination–insertion initiators in the bulk ring-opening polymerization (ROP) of l-lactide (LLA). In order to compare their efficiencies with the more commonly used tin(ii) 2-ethylhexanoate (stannous octoate, Sn(Oct)₂) and conventi ...
DOI:
10.1039/d0ra07635j

18. Solid–liquid equilibrium and thermochemical properties of the TNT–DINA system

Author:
T. Gołofit; K. Gańczyk-Specjalska; K. Posala
Source:
Thermochimica acta 2020 v.690 pp. 178655
ISSN:
0040-6031
Subject:
differential scanning calorimetry,   etc   ; endothermy; melting; melting point; mixtures; physical phases;     Show all 6 Subjects
Abstract:
... Melting is a basic physicochemical process, used in examination of explosive mixtures elaborated by casting. In this paper, the melting process of TNT–DINA two-component mixture was analysed. Phase transformations of the system were investigated by means of differential scanning calorimetry. Several endothermic transformations were observed, with one being associated with the melting process of TN ...
DOI:
10.1016/j.tca.2020.178655

19. Study of the curing kinetics of melamine/phthalonitrile resin system

Author:
Jiangbo Lv; Jinlang Hong; Bo Liang; Erjin Zhao; Ke Zeng; Menghao Chen; Jianghuai Hu; Gang Yang
Source:
Thermochimica acta 2020 v.683 pp. 178442
ISSN:
0040-6031
Subject:
differential scanning calorimetry,   etc   ; activation energy; catalytic activity; melamine; models; resins;     Show all 6 Subjects
Abstract:
... The exploration of curing process is important for the application of phthalonitrile resins in advanced materials. In this study, the curing behaviors of 1,3-bis (3,4-dicyanophenoxy) benzene (3BOCN) and melamine (MI) system was studied by differential scanning calorimetry (DSC) at different heating rates. An autocatalytic model could describe the curing reaction of 3BOCN-MI. The curing parameters ...
DOI:
10.1016/j.tca.2019.178442

20. Heat capacities of ionic liquids based on tetrahydrothiophenium cation and NTf2 anion

Author:
Dzmitry H. Zaitsau; Alexa Schmitz; Christoph Janiak; Sergey P. Verevkin
Source:
Thermochimica acta 2020 v.686 pp. 178547
ISSN:
0040-6031
Subject:
differential scanning calorimetry,   etc   ; cations; heat; imidazoles; ionic liquids; salts; temperature;     Show all 7 Subjects
Abstract:
... The isobaric heat capacities of seven ionic liquids (ILs) based on the S-alkyl-tetrahydrothiophenium cation [CₙTHT] with alkyl chain lengths of Cₙ = 4,5,6,7,8,9,10 and the bis[(trifluoromethyl)sulfonyl]imide, [NTf₂] anion were measured in a differential scanning calorimeter in the temperature range 310−376 K. Measurements have been performed for the first time. Experimental results were extrapolat ...
DOI:
10.1016/j.tca.2020.178547