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1. A New approach to evaluating ink curing time using differential scanning calorimetry

Author:
Horlor, Brian; Hoover, Carianne; Lamb, James; Ramirez, Michael; Soto, Carissa M.; Carlo, Steven
Source:
Thermochimica acta 2020 v.687 pp. 178579
ISSN:
0040-6031
Subject:
differential scanning calorimetry,   etc   ; coatings; drying; standard deviation;     Show all 4 Subjects
Abstract:
... A new method for analyzing the drying characteristics of ink has been developed using Differential Scanning Calorimetry (DSC). DSC is able to determine the drying time of an ink in 30–45 min. In contrast, the ASTM method uses a Beck-Koller (BK) Dryer instrument to draw a stylus across an ink film to evaluate film drying, which can take hours or days depending on the film. This DSC method is compar ...
DOI:
10.1016/j.tca.2020.178579

2. Some practical aspects of heat capacity determination by differential scanning calorimetry

Author:
Bernardes, Carlos E.S.; Joseph, Abhinav; da Piedade, Manuel E. Minas
Source:
Thermochimica acta 2020 v.687 pp. 178574
ISSN:
0040-6031
Subject:
differential scanning calorimetry,   etc   ; benzoic acid; geometry; heat; temperature;     Show all 5 Subjects
Abstract:
... Differential Scanning Calorimetry (DSC) is a widely accessible and versatile method for the determination of the heat capacities of organic materials as a function of temperature. In routine use, it is typically possible to obtain results with an accuracy better than 3 %. However, to achieve this level of accuracy, careful optimization of the experimental procedure for a specific apparatus must be ...
DOI:
10.1016/j.tca.2020.178574

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

Author:
Zaitsau, Dzmitry H.; Schmitz, Alexa; Janiak, Christoph; Verevkin, Sergey P.
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

4. Redox energetics and enthalpy increments of GdBaCo2O6-δ

Author:
Tsvetkov, D.S; Sednev-Lugovets, A.L; Sereda, V.V; Malyshkin, D.A; Ivanov, I.L; Zuev, A.Yu
Source:
Thermochimica acta 2020 v.686 pp. 178562
ISSN:
0040-6031
Subject:
differential scanning calorimetry,   etc   ; enthalpy; heat; oxides; oxygen; phase transition; temperature;     Show all 7 Subjects
Abstract:
... The enthalpy increments for the GdBaCo₂O₆₋δ double perovskite were determined by means of drop calorimetry in air in the temperature range between 365.4 K and 1272.4 K. The heats of orthorhombic I→orthorhombic II phase transition at 347.2 K and orthorhombic II→tetragonal transition at 745.8 K are equal to (2.95 ± 0.07) kJ·mol⁻¹ and (2.40 ± 0.09) kJ·mol⁻¹, respectively, as measured with differentia ...
DOI:
10.1016/j.tca.2020.178562

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

Author:
Lv, Jiangbo; Hong, Jinlang; Liang, Bo; Zhao, Erjin; Zeng, Ke; Chen, Menghao; Hu, Jianghuai; Yang, Gang
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

6. Thermodynamic functions of holmium orthophosphate HoPO4 in the range 9–1370 K

Author:
Tyurin, A.V.; Ryumin, M.A.; Khoroshilov, A.V.; Gurevich, V.M.; Gavrichev, K.S.
Source:
Thermochimica acta 2020 v.683 pp. 178459
ISSN:
0040-6031
Subject:
differential scanning calorimetry,   etc   ; energy; enthalpy; entropy; heat; holmium; orthophosphates; temperature;     Show all 8 Subjects
Abstract:
... The heat capacity of holmium orthophosphate HoPO₄ was studied using an adiabatic and a differential scanning calorimetry in the temperatures intervals 9–338 and 310–1374 K, relatively. Heat capacity anomaly connected with the splitting of ground state electronic levels of f-shell was determined. Values of smoothed thermodynamic functions (heat capacity, entropy, enthalpy change and derived Gibbs e ...
DOI:
10.1016/j.tca.2019.178459

7. Exploring the role of lignin structure in molecular dynamics of lignin/bio-derived thermoplastic elastomer polyurethane blends

Author:
Ortiz-Serna, P.; Carsí, M.; Culebras, M.; Collins, M.N.; Sanchis, M.J.
Source:
International journal of biological macromolecules 2020 v.158 pp. 1369-1379
ISSN:
0141-8130
Subject:
differential scanning calorimetry,   etc   ; activation energy; glass; lignin; mixing; molecular dynamics; polyurethanes; spectroscopy; temperature; thermoplastics;     Show all 10 Subjects
Abstract:
... The relaxation behavior of two lignins (Alcell organosolv, OSL, and hydroxypropyl modified Kraft, ML) and bio-based thermoplastic polyurethane (TPU) blends have been studied by Differential scanning calorimetry (DSC), Dynamic-mechanical analysis (DMA) and Dielectric relaxation spectroscopy (DRS). The effect of blending on the glass and local relaxation processes as a function of composition, frequ ...
DOI:
10.1016/j.ijbiomac.2020.04.261

8. Mechanism of ice nucleation inhibition of PVA and PVP in aqueous glycerin solution

Author:
Sheng, Wei; Li, Xueli; Pei, Yang; Wang, Ruirui; Zhang, Xinming; Pang, Shusheng
Source:
Thermochimica acta 2020 v.689 pp. 178617
ISSN:
0040-6031
Subject:
differential scanning calorimetry,   etc   ; additives; glycerol; hydrogen bonding; ice nucleation; molecular dynamics; polyvinyl alcohol; polyvinylpyrrolidone; temperature;     Show all 9 Subjects
Abstract:
... In order to find effective anti-ice nucleation agents, polyvinyl pyrrolidone (PVP) and polyvinyl alcohol (PVA) as additives in glycerin – water solution was froze and investigated by Differential Scanning Calorimeter (DSC). The results show that PVA has stronger inhibition effect than PVP, and the effect can be enhanced with increasing of the additive concentration. The solution nucleation tempera ...
DOI:
10.1016/j.tca.2020.178617

9. Model-free cure kinetics of additional liquid silicone rubber

Author:
Ke, Qining; Wu, Chonggang; Chen, Xuhuang
Source:
Thermochimica acta 2020 v.688 pp. 178584
ISSN:
0040-6031
Subject:
differential scanning calorimetry,   etc   ; activation energy; catalysts; liquids; moieties; resins; rubber; silicone; temperature;     Show all 9 Subjects
Abstract:
... Differential scanning calorimetry was used to study the curing behavior of an additional liquid silicone rubber. Kissinger‒Akahira‒Sunose (KAS), Flynn‒Wall‒Ozawa (FWO), and Friedman (FR) model-free methods were used to calculate the curing activation energy of the additional liquid silicone rubber. The isothermal degree of cure vs. curing time curve was predicted by the Vyazovkin method at a tempe ...
DOI:
10.1016/j.tca.2020.178584

10. Kinetic analysis of hydrothermal carbonization using high-pressure differential scanning calorimetry applied to biomass

Author:
Pecchi, Matteo; Patuzzi, Francesco; Benedetti, Vittoria; Di Maggio, Rosa; Baratieri, Marco
Source:
Applied energy 2020 v.265 pp. 114810
ISSN:
0306-2619
Subject:
differential scanning calorimetry,   etc   ; activation energy; biomass; catalytic activity; enthalpy; heat; hydrothermal carbonization; kinetics; models; sludge;     Show all 10 Subjects
Abstract:
... Assessing kinetic parameters of hydrothermal carbonization still requires several tests and time-consuming analyses, usually relying on few data points. With a view to containing the experimental effort and testing the accuracy of models based on continuum curves, high-pressure differential scanning calorimetry was used for the first time to assess the heat release profile, the overall enthalpy ch ...
DOI:
10.1016/j.apenergy.2020.114810

11. Effects of maltogenic amylase from Lactobacillus plantarum on retrogradation of bread

Author:
Woo, Seung-Hye; Shin, Yu-Jeong; Jeong, Hyun-Mo; Kim, Ji-Soo; Ko, Dam-Seul; Hong, Jung Sun; Choi, Hee-Don; Shim, Jae-Hoon
Source:
Journal of cereal science 2020 v.93 pp. 102976
ISSN:
0733-5210
Subject:
differential scanning calorimetry,   etc   ; Lactobacillus plantarum; amylases; amylopectin; antistaling agents; breads; glucose; hardness; retrogradation;     Show all 9 Subjects
Abstract:
... Maltogenic amylase originated from Lactobacillus plantarum (LpMA) was studied to investigate its applicability as an antistaling enzyme. The differential scanning calorimetry (DSC) results demonstrated that the bread treated with purified LpMA exhibited a retrogradation peak that was 65% that of the control bread. Then, for the purpose of practically using L. plantarum as an antistaling agent, the ...
DOI:
10.1016/j.jcs.2020.102976

12. Metamorphic barcodes based on lithographically defined microdots incorporating nanoparticles of phase change materials

Author:
Wang, Miao; Wang, Chaoming; Ma, Ruiting; Hu, Weike; Su, Ming
Source:
Journal of materials science 2020 v.55 no.14 pp. 5823-5831
ISSN:
0022-2461
Subject:
differential scanning calorimetry,   etc   ; alloys; forensic sciences; magnetic materials; melting; melting point; nanoparticles; polymers;     Show all 8 Subjects
Abstract:
... Printed barcode lacks distributability as each barcode associated with sample cannot be divided when multiple copies of the same barcode are needed for forensic analysis. This article reports a metamorphic barcode with desired distributability to label objects (liquids or solids) in a covert and high-fidelity manner using polymer microdots containing a panel of phase change nanoparticles (low melt ...
DOI:
10.1007/s10853-020-04429-5

13. Valorization of Palm-Oil Residues: Integrated Production of a Good Quality Bio-coal and Electricity via Torrefaction

Author:
Gallego, Luis Javier; Cardona, Sandra; Martínez, Edgar; Rios, Luis Alberto
Source:
Waste and biomass valorization 2020 v.11 no.5 pp. 2273-2284
ISSN:
1877-2641
Subject:
differential scanning calorimetry,   etc   ; biocoal; byproducts; coal; drying; electricity; energy balance; fruits; heat; palm oils; torrefaction;     Show all 11 Subjects
Abstract:
... Energy valorization of empty fruit bunches (EFB), via torrefaction, was investigated to stablish the best process conditions and the energy balance of an integrated plant. Differential scanning calorimetry was used, for the first time, as a new and more accurate method to determine the heat involved in the torrefaction process. This technique showed that the torrefaction of EFB is an endothermal p ...
DOI:
10.1007/s12649-018-0459-7

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

Author:
Fiola, Gregory J.; Chaudhari, Dushyant M.; Stoliarov, Stanislav I.
Source:
Fire safety journal 2020 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

15. Computer modelling and experimental investigation of phase change hysteresis of PCMs: The state-of-the-art review

Author:
Klimeš, Lubomír; Charvát, Pavel; Mastani Joybari, Mahmood; Zálešák, Martin; Haghighat, Fariborz; Panchabikesan, Karthik; El Mankibi, Mohamed; Yuan, Yanping
Source:
Applied energy 2020 v.263 pp. 114572
ISSN:
0306-2619
Subject:
differential scanning calorimetry,   etc   ; computer simulation; hysteresis; melting; models; solidification; supercooling; temperature; thermal energy;     Show all 9 Subjects
Abstract:
... The present review provides an overview and critical analysis of recently published simulation approaches and experimental studies addressing the phase change hysteresis (PCH) and supercooling (SC) of phase change materials (PCMs). In terms of the enthalpy-temperature h(T) relationships for the solid-liquid phase changes, the PCH is a temperature delay of the h(T) curves between the melting and so ...
DOI:
10.1016/j.apenergy.2020.114572

16. Cure kinetics of low-molar-ratio urea-formaldehyde resins reinforced with modified nanoclay using different kinetic analysis methods

Author:
Wibowo, Eko Setio; Park, Byung-Dae
Source:
Thermochimica acta 2020 v.686 pp. 178552
ISSN:
0040-6031
Subject:
differential scanning calorimetry,   etc   ; activation energy; adhesion; bentonite; catalytic activity; kinetics; nanoclays; resins; urea formaldehyde;     Show all 9 Subjects
Abstract:
... This study reports on low-molar-ratio urea-formaldehyde (UF) resins modified with transition-metal-ion-modified bentonite (TMI-BNT) nanoclay assessed using different kinetic analysis methods in order to understand the effect of TMI-BNT on the cure kinetics of these modified resins. Differential scanning calorimetry was used to determine the kinetic parameters using two types of cure kinetic analys ...
DOI:
10.1016/j.tca.2020.178552

17. Decomposition of HMX in solid and liquid states under nanoconfinement

Author:
Bari, Rozana; Koh, Yung P.; McKenna, Gregory B.; Simon, Sindee L.
Source:
Thermochimica acta 2020 v.686 pp. 178542
ISSN:
0040-6031
Subject:
differential scanning calorimetry,   etc   ; activation energy; catalytic activity; heat; melting; models; thermal properties;     Show all 7 Subjects
Abstract:
... The thermal properties of bulk and nanoconfined HMX were studied using differential scanning calorimetry in dynamic scanning mode at rates ranging from 0.3 to 100 °C/min. At the slowest heating rates, decomposition occurs in the solid phase; at intermediate heating rates, it starts in the solid phase, melts, and finishes with a faster rate of reaction in the liquid state; and at the highest heatin ...
DOI:
10.1016/j.tca.2020.178542

18. Heat capacity and decomposition of rimantadine hydrochloride

Author:
Bazyleva, Ala; Paulechka, Eugene; Zaitsau, Dzmitry H.; Blokhin, Andrey V.; Kabo, Gennady J.
Source:
Thermochimica acta 2020 v.686 pp. 178538
ISSN:
0040-6031
Subject:
differential scanning calorimetry,   etc   ; antiviral agents; enthalpy; heat; hydrochloric acid; quantum mechanics; temperature; thermogravimetry;     Show all 8 Subjects
Abstract:
... Heat capacities of the antiviral drug rimantadine hydrochloride in the crystalline state were measured by adiabatic calorimetry and differential scanning calorimetry in the temperature range from (7 to 453) K. A broad low-enthalpy solid-state phase anomaly was detected between (170 and 250) K. Thermodynamic functions for crystalline rimantadine hydrochloride were derived. Decomposition of the stud ...
DOI:
10.1016/j.tca.2020.178538

19. Kinetics of Cr clustering in a Cu-Cr-Zr alloy processed by equal-channel angular pressing: A DSC study

Author:
Bourezg, Yousf Islem; Abib, Khadidja; Azzeddine, Hiba; Bradai, Djamel
Source:
Thermochimica acta 2020 v.686 pp. 178550
ISSN:
0040-6031
Subject:
differential scanning calorimetry,   etc   ; activation energy; alloys; ambient temperature; chromium; pressing; zirconium;     Show all 7 Subjects
Abstract:
... The kinetics of Cr clustering process in a commercial Cu-1Cr-0.1 Zr (wt.%) alloy processed by equal channel angular pressing (ECAP) via route BC at room temperature for 1, 8 and 16 passes, has been investigated using Differential Scanning Calorimetry (DSC). The DSC scan results showed that the Cr clustering peak temperature reaction increases with increasing the heating rate and decreased with the ...
DOI:
10.1016/j.tca.2020.178550

20. Regioselective Synthesis of Methyl-Substituted Adamantanes for Promoting Oxidation Stability of High-Density Fuels

Author:
Xie, Jiawei; Liu, Yi; Jia, Tinghao; Pan, Lun; Fang, Yunming; Shi, Chengxiang; Nie, Genkuo; Zhang, Xiangwen; Zou, Ji-Jun
Source:
Energy & fuels 2020 v.34 no.4 pp. 4516-4524
ISSN:
1520-5029
Subject:
differential scanning calorimetry,   etc   ; activation energy; alkylation; carbon; fuels; moieties; oxidation; oxidative stability; reaction kinetics; regioselectivity;     Show all 10 Subjects
Abstract:
... Alkyl-adamantane fuels have drawn tremendous attention for aerospace vehicles due to their high density and high oxidation stability. Here, we reported a regioselective route to synthesize methyl-substituted adamantanes including 1,3,5-trimethyl-adamantane and 1,3,5,7-tetramethyl-adamantane with single configuration via alkylation of 1,3-dimethyl-adamantane, with yields of ∼60 and ∼80%, respective ...
DOI:
10.1021/acs.energyfuels.0c00442