Determination of solid-liquid phase equilibria of binary organic systems by differential scanning calorimetry

1989 ◽  
Vol 96 (3) ◽  
pp. 596-604 ◽  
Author(s):  
Masakuni Matsuoka ◽  
Rika Ozawa
Keyword(s):  
Differential Scanning Calorimetry ◽  
Liquid Phase ◽  
Phase Equilibria ◽  
Scanning Calorimetry ◽  
Organic Systems ◽  
Solid Liquid

Solid-liquid phase equilibrium diagrams of binary mixtures containing fatty acids, fatty alcohol compounds and tripalmitin using differential scanning calorimetry

2019 ◽  
Vol 497 ◽  
pp. 19-32 ◽  
Author(s):  
Fernanda Paludetto Pelaquim ◽  
Flávio Cardoso de Matos ◽  
Lisandro Pavie Cardoso ◽  
Eduardo Augusto Caldas Batista ◽  
Antonio José de Almeida Meirelles ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Differential Scanning Calorimetry ◽  
Phase Equilibrium ◽  
Liquid Phase ◽  
Binary Mixtures ◽  
Fatty Alcohol ◽  
Scanning Calorimetry ◽  
Solid Liquid

Determination of solid–liquid phase equilibria by using measured DSC curves

2002 ◽  
Vol 194-197 ◽  
pp. 1107-1117 ◽  
Author(s):  
Hiroshi Takiyama ◽  
Hirobumi Suzuki ◽  
Hirohisa Uchida ◽  
Masakuni Matsuoka
Keyword(s):  
Liquid Phase ◽  
Phase Equilibria ◽  
Solid Liquid ◽  
Dsc Curves

Mixtures of d- and l-carvone: I. Differential scanning calorimetry and solid-liquid phase diagram

1996 ◽  
Vol 274 ◽  
pp. 231-242 ◽  
Author(s):  
H.E. Gallis ◽  
F. Bougrioua ◽  
H.A.J. Oonk ◽  
P.J. van Ekeren ◽  
J.C. van Miltenburg
Keyword(s):  
Phase Diagram ◽  
Differential Scanning Calorimetry ◽  
Liquid Phase ◽  
Scanning Calorimetry ◽  
Solid Liquid

Incidence of the melting-degradation process of vitamin C on the determination of the phase diagram with acetaminophen enhanced by high performance liquid chromatography tools

2015 ◽  
Vol 39 (3) ◽  
pp. 1938-1942 ◽  
Author(s):  
Yohann Corvis ◽  
Marie-Claude Menet ◽  
Philippe Espeau
Keyword(s):  
Phase Diagram ◽  
Differential Scanning Calorimetry ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Performance ◽  
Degradation Process ◽  
Liquid Equilibrium ◽  
Scanning Calorimetry ◽  
Solid Liquid

The exact solid–liquid equilibrium between ascorbic acid and acetaminophen was established combining high performance liquid chromatography and differential scanning calorimetry.

scholarly journals Thermochemistry of Eight Membered Ring Hydrocarbons. The Enthalpy of Formation of Cyclooctane

2001 ◽  
Vol 71 (3) ◽  
pp. 507-515
Author(s):  
Daniela Gheorghe ◽  
Ana Neacsu ◽  
Stefan Perisanu
Keyword(s):  
Differential Scanning Calorimetry ◽  
Liquid Phase ◽  
Phase Change ◽  
Enthalpy Of Formation ◽  
Membered Ring ◽  
Heat Of Combustion ◽  
Enthalpies Of Formation ◽  
Scanning Calorimetry ◽  
Solid Liquid ◽  
The Enthalpy Of Formation

A new value of the enthalpy of formation of cyclooctane (-156.2�1.2 kJ mol-1) based on heat of combustion measurements is reported. Its solid - liquid phase change was investigated by differential scanning calorimetry in both directions revealing an overcooling effect of over 23 K. Our enthalpy of formation of cyclooctane was used together with literature values of heats of hydrogenation of 8 carbon atoms cycloolefins to calculate the enthalpies of formation of the later. The strain energies of the investigated molecules were calculated and discussed.

The HLM method: a simple way to get the solid–liquid phase diagrams and enthalpies of transition of pure components and mixtures

1992 ◽  
Vol 70 (11) ◽  
pp. 2745-2750 ◽  
Author(s):  
François Quirion ◽  
Daniel Lambert ◽  
Gérald Perron
Keyword(s):  
Differential Scanning Calorimetry ◽  
Chemical Engineering ◽  
Low Cost ◽  
Polymer Science ◽  
Scanning Calorimetry ◽  
Simple Method ◽  
Melting Temperatures ◽  
Solid Liquid ◽  
Better Than

A simple method of thermal analysis is described which gives the same information as differential scanning calorimetry. The method is based on the Heat-Leak-Modulus, HLM, of a sample cell placed in a constant temperature reservoir. In the present study, the HLM method is used for the investigation of pure components and mixtures from −190 to 50 °C. The method allows the determination of glass-transition, crystallizations, solid–solid transition, eutectic, and melting temperatures with a reproducibility better than ±0.1 °C. The enthalpy of a transition can be determined with a reproducibility of ±5%. The simplicity, the low cost, and the precision of the HLM method fills the gap between standard cooling curves and sophisticated differential scanning calorimetry experiments. The HLM method has numerous applications in physical chemistry, polymer science, metallurgy, and chemical engineering.

Effect of pressure on the solid-liquid phase equilibria of binary organic systems

1989 ◽  
Vol 10 (1) ◽  
pp. 27-34 ◽  
Author(s):  
K. Nagaoka ◽  
T. Makita ◽  
N. Nishiguchi ◽  
M. Moritoki
Keyword(s):  
Liquid Phase ◽  
Phase Equilibria ◽  
Effect Of Pressure ◽  
Organic Systems ◽  
Solid Liquid

scholarly journals Voltammetric monitoring of a solid-liquid phase transition in N,N,N′,N′-tetraoctyl-2,6-diamino-9,10-anthraquinone (TODAQ)

2019 ◽  
Vol 24 (1) ◽  
pp. 11-16
Author(s):  
Sunyhik Ahn ◽  
Thomas R. Forder ◽  
Matthew D. Jones ◽  
Richard A. R. Blackburn ◽  
Paul S. Fordred ◽  
...  
Keyword(s):  
Phase Transition ◽  
Activation Energy ◽  
Differential Scanning Calorimetry ◽  
Liquid Phase ◽  
Apparent Activation Energy ◽  
Electrode Surface ◽  
Scanning Calorimetry ◽  
Liquid Phase Transition ◽  
Midpoint Potential ◽  
Solid Liquid

AbstractExploratory experiments on effects from a phase transition are reported for a low-melting microcrystalline anthraquinone (N,N,N′,N′-tetraoctyl-2,6-diamino-9,10-anthraquinone or TODAQ). Data for the solid-liquid phase transition are obtained by differential scanning calorimetry and then compared to data obtained by voltammetry. In preliminary electrochemical measurements, microcrystal deposits on a basal plane pyrolytic graphite electrode are shown to undergo a solid-state 2-electron 2-proton reduction in contact to aqueous 0.1 M HClO4 with a midpoint potential Emid,solid = − 0.24 V vs. SCE. The reduction mechanism is proposed to be limited mainly by the triple phase boundary line and some transport of TODAQ molecules towards the electrode surface for both solid and melt. A change in the apparent activation energy for this reduction is observed at 69 °C, leading to an enhanced increase in reduction current with midpoint potential Emid,liquid = − 0.36 V vs. SCE. A change of TODAQ transport along the crystal surface for solid microcrystalline material (for the solid) to diffusion within molten microdroplets (for the liquid) is proposed. Upon cooling, a transition at 60 °C back to a higher apparent activation energy is seen consistent with re-solidification of the molten phase at the electrode surface. Differential scanning calorimetry data for solid TODAQ dry and for TODAQ in contact to aqueous 0.1 M HClO4 confirm these transitions.

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