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differentialscanningcalorimetry, 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 ...
differentialscanningcalorimetry, 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 ...
... 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 ...
differentialscanningcalorimetry, 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 ...
differentialscanningcalorimetry, 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 ...
differentialscanningcalorimetry, 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 ...
differentialscanningcalorimetry, 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 ...
differentialscanningcalorimetry, 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 ...
differentialscanningcalorimetry, 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 ...
... 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 ...
Karina Salas-López; Miguel A. García-Castro; Patricia Amador; Ana M. Herrera-González; Alberto Galicia-Aguilar; Francisco A. Amador; Fernanda Hernández-Pascasio; Henoc Flores
... 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 ...
... 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 ...
differentialscanningcalorimetry, 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 ...
differentialscanningcalorimetry, 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 ...
... 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 ...
differentialscanningcalorimetry, 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 ...
differentialscanningcalorimetry, 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 ...
differentialscanningcalorimetry, 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 ...
differentialscanningcalorimetry, 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 ...
differentialscanningcalorimetry, 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 ...