Differential thermal analysis (DTA) at high pressures: phase behaviour of pure and gas-saturated liquid crystals up to 270 MPa

1994 ◽  
Vol 231 ◽  
pp. 169-175 ◽  
Author(s):  
R. Krombach ◽  
G.M. Schneider
Keyword(s):  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Liquid Crystals ◽  
High Pressures ◽  
Phase Behaviour ◽  
Saturated Liquid

scholarly journals DIFFERENTIAL THERMAL ANALYSIS OF SILK FIBROIN THREAD UNDER HIGH PRESSURES OF NITROGEN

1978 ◽  
Vol 34 (8) ◽  
pp. T349-T353
Author(s):  
Masuhiro Tukada ◽  
Kiyoshi Hirabayashi ◽  
Tadashi Komoto ◽  
Toru Kawai
Keyword(s):  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Silk Fibroin ◽  
High Pressures

Phase Diagrams of Mesogenic Binary Systems of Cobalt(II) and Univalent Metal Octanoates

2011 ◽  
Vol 66 (10-11) ◽  
pp. 661-667 ◽  
Author(s):  
Inna I. Tokmenko ◽  
Tatyana A. Mirnaya ◽  
Galina G. Yaremchuk
Keyword(s):  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Liquid Crystals ◽  
Phase Diagrams ◽  
Liquid Crystalline ◽  
Binary Systems ◽  
Polarization Microscopy ◽  
Sodium Potassium

The phase diagrams of binary systems of cobalt(II) octanoate and lithium, sodium, potassium, and thallium(I) octanoates have been studied by differential thermal analysis and polythermal polarization microscopy. In all systems, continuous or limited liquid crystalline solutions of smectic modification are formed. The temperature and composition ranges of the formation of liquid crystals and glasses have been determined.

Differential Thermal Analysis and PVT Measurements on 2,2,2-Trichloro-ethanol Under High Pressure

1997 ◽  
Vol 52 (6-7) ◽  
pp. 493-501 ◽  
Author(s):  
M. Jenau ◽  
M. Sandmann ◽  
A. Würflinger ◽  
J. Ll. Tamarit
Keyword(s):  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Atmospheric Pressure ◽  
Solid Phase ◽  
Melting Curve ◽  
Phase Behaviour ◽  
Enthalpy Changes ◽  
Pvt Measurements ◽  
Plastic Phase ◽  
Lower Temperature

Abstract The phase behaviour, the calorimetric and volumetric properties of 2,2,2-trichloro-ethanol (TCE) have been studied with differential thermal analysis (DTA) and pVT measurements in the pressure range 1 atm to 300 MPa and temperatures between 250 K to 355 K. TCE displays a metastable plastic phase (solid I') and a non-plastic solid phase II at atmospheric pressure. At least two pressure-induced solid phases have been detected: a stable plastic phase (solid I') and a non-plastic phase (solid III). There are two sets of triple points: a) 123 MPa and 308 K with the phases solid I, solid II and the liquid, b) 243 MPa and 316 K for solid I, II, III. Furthermore a metastable low-temperature brittle form (solid II') has been found, which transforms to solid I at a considerably lower temperature than solid II. The melting curve of solid I' can be pursued to higher pressures up to 260 MPa. On the other hand, the melting curve of the stable plastic phase solid I can be extrapolated beyond the triple point to pressures below 123 MPa. Volume and enthalpy changes are reported for all phase transitions.

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