Flow Method Vapour Pressure Determination and Characterization of Tetrakis(Trifluoropentanedionato)-Thorium(IV) and Tetrakis (Heptafluorodimethyloctanedionato)-Thorium(IV)

1986 ◽  
Vol 90 (5) ◽  
pp. 459-463 ◽  
Author(s):  
G. Gärtner ◽  
P. Janiel ◽  
H. Rau ◽  
H. A. M. Van Hal ◽  
H. J. P. Nabben
Keyword(s):  
Vapour Pressure ◽  
Flow Method

Characterization of the PMMA- and PEO-, di- and triblock copolymers, by light scattering, SEC and vapour pressure osmometry

Polymer ◽  
1999 ◽  
Vol 40 (7) ◽  
pp. 1833-1837 ◽  
Author(s):  
Th. Bogumil ◽  
S. Höring ◽  
H. Budde ◽  
K.-F. Arndt
Keyword(s):  
Light Scattering ◽  
Vapour Pressure ◽  
Triblock Copolymers

Vapour pressure of isotopic solids by a steady flow method: Argon between 72 °K and triple point

1962 ◽  
Vol 23 (6) ◽  
pp. 1041-1053 ◽  
Author(s):  
G. Boato ◽  
G. Scoles ◽  
M. E. Vallauri
Keyword(s):  
Steady Flow ◽  
Triple Point ◽  
Vapour Pressure ◽  
Flow Method

scholarly journals A method for extracting calibrated volatility information from the FIGAERO-HR-ToF-CIMS and its experimental application

2019 ◽  
Vol 12 (3) ◽  
pp. 1429-1439 ◽  
Author(s):  
Thomas J. Bannan ◽  
Michael Le Breton ◽  
Michael Priestley ◽  
Stephen D. Worrall ◽  
Asan Bacak ◽  
...  
Keyword(s):  
Vapour Pressure ◽  
Homologous Series ◽  
Measurement Techniques ◽  
Ionization Mass ◽  
Particle Phase ◽  
Knudsen Effusion ◽  
Vapour Pressure Measurement ◽  
Knudsen Effusion Mass Spectrometry ◽  
Real Atmosphere

Abstract. The Filter Inlet for Gases and AEROsols (FIGAERO) is an inlet specifically designed to be coupled with the Aerodyne High-Resolution Time-of-Flight Chemical Ionization Mass Spectrometer (HR-ToF-CIMS). The FIGAERO-HR-ToF-CIMS provides simultaneous molecular information relating to both the gas- and particle-phase samples and has been used to extract vapour pressures (VPs) of the compounds desorbing from the filter whilst giving quantitative concentrations in the particle phase. However, such extraction of vapour pressures of the measured particle-phase components requires use of appropriate, well-defined, reference compounds. Vapour pressures for the homologous series of polyethylene glycols (PEG) ((H-(O-CH2-CH2)n-OH) for n=3 to n=8), covering a range of vapour pressures (VP) (10−1 to 10−7 Pa) that are atmospherically relevant, have been shown to be reproduced well by a range of different techniques, including Knudsen Effusion Mass Spectrometry (KEMS). This is the first homologous series of compounds for which a number of vapour pressure measurement techniques have been found to be in agreement, indicating the utility as a calibration standard, providing an ideal set of benchmark compounds for accurate characterization of the FIGAERO for extracting vapour pressure of measured compounds in chambers and the real atmosphere. To demonstrate this, single-component and mixture vapour pressure measurements are made using two FIGAERO-HR-ToF-CIMS instruments based on a new calibration determined from the PEG series. VP values extracted from both instruments agree well with those measured by KEMS and reported values from literature, validating this approach for extracting VP data from the FIGAERO. This method is then applied to chamber measurements, and the vapour pressures of known products are estimated.

Basic characterization of polypropene-block-poly(methylene-1,3-cyclopentane-co-propene) synthesized from propene and 1,5-hexadiene with modified stopped-flow method

2001 ◽  
Vol 50 (5) ◽  
pp. 568-571 ◽  
Author(s):  
Hiroyuki Kono ◽  
Tomohito Ichiki ◽  
Hideharu Mori ◽  
Hisayuki Nakatani ◽  
Minoru Terano
Keyword(s):  
Stopped Flow ◽  
Flow Method

Designing Stability into Thermally Reactive Plumbylenes

2018 ◽  
Author(s):  
Goran Bacic ◽  
David Zanders ◽  
Anjana Devi ◽  
Sean Barry
Keyword(s):  
Structural Analysis ◽  
Vapour Pressure ◽  
Room Temperature ◽  
Vapour Deposition ◽  
Thermal Characterization ◽  
Oxidative Cleavage ◽  
High Yield ◽  
Thermal Window ◽  
The Stability

We complete the picture of thermally stable and volatile <i>N-</i>heterocyclic metallylenes with the synthesis, structural analysis, and thermal characterization of <i>rac</i>-<i>N</i><sup>2</sup>,<i>N</i><sup>3</sup>-di-<i>tert</i>-butylbutane-2,3-diamido lead(II) (<b>1Pb</b>). Transamination of bis[bis(trimethylsilyl)amido] lead(II) with the free diamino ligand yields <b>1Pb</b> in high yield, whereas salt-metathesis leads to oxidative cleavage of the butane backbone and production of acetaldehyde-<i>tert-</i>butylimine. <b>1Pb</b> itself undergoes [2+2+1] cycloreversion at 150 °C to the same imine, but with a vapour pressure of 1 Torr at 94 °C a wide thermal window is available for use as a vapour deposition precursor.<div><br></div><div>We contrast this with the the extreme instability of its sisters <i>N</i><sup>2</sup>,<i>N</i><sup>3</sup>-di-<i>tert</i>-butylethane-2,3-diamido lead(II) (<b>2Pb</b>) and <i>N</i><sup>2</sup>,<i>N</i><sup>3</sup>-di-<i>tert</i>-butylethylene-2,3-diamido lead(II) (<b>3Pb</b>), which both reductively eliminate Pb(0) at or below room temperature. This is also in start contrast to the stability of the lighter Si, Ge and Sn congeners.</div>

scholarly journals Characterization of hydrogen storage materials by means of pressure concentration isotherms based on the mass flow method

2009 ◽  
Vol 80 (8) ◽  
pp. 083901 ◽  
Author(s):  
Michael Bielmann ◽  
Shunsuke Kato ◽  
Philippe Mauron ◽  
Andreas Borgschulte ◽  
Andreas Züttel
Keyword(s):  
Hydrogen Storage ◽  
Mass Flow ◽  
Hydrogen Storage Materials ◽  
Flow Method ◽  
Storage Materials ◽  
Pressure Concentration

scholarly journals On the measurement of the variation of the specific heat of Aniline with temperature, using the continuous flow electric method

1928 ◽  
Vol 118 (779) ◽  
pp. 138-156 ◽  
Keyword(s):  
Specific Heat ◽  
Vapour Pressure ◽  
Continuous Flow ◽  
Freezing Point ◽  
Reliable Data ◽  
Flow Method ◽  
Continuous Flow Method

These experiments were undertaken in order to obtain reliable data on the variation of the specific beat with temperature of a liquid of low vapour pressure, in the neighbourhood of its freezing point. The employment of a continuous flow method required large quantities of the liquid, and aniline was chosen as it was thought that it could be procured in bulk, pure and dry. Unfortunately, this proved less easy than was anticipated and was one of the chief difficulties encountered. In addition, the viscosity of aniline increases very rapidly below about 10° C., which caused some uncertainty below this temperature. Most of the ordinary laboratory materials are slowly attacked by aniline ; the earlier apparatus was constructed without rubber, and this necessitated the use of a hermetically sealed calorimeter. Subsequently a good quality rubber was found that withstood the action of aniline, and this greatly simplified the mechanical difficulties.

scholarly journals In-Plane Permeability Measurement of Biaxial Woven Fabrics by 2D-Radial Flow Method

2021 ◽  
Vol 28 (1) ◽  
pp. 153-159
Author(s):  
Muhammad Azhar Ali Khan
Keyword(s):  
Radial Flow ◽  
Constant Pressure ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Flow Method ◽  
Wide Range ◽  
Filling Time ◽  
Flow Through ◽  
Weaving Pattern

AbstractThe accurate characterization of fabrics used in vacuum assisted resin transfer molding (VARTM) is essential in order to model the flow through these porous preforms. A wide range of these fabrics are available for composite manufacturing through VARTM and thus brings about a need to opt a methodology which characterizes the in-plane permeability of these preforms. These permeability values can then be used in simulations that can track the flow front progression and mold filling time. This work identifies the permeability of an E-glass fabric based on Darcy's law. Woven fabric having areal weight of 200 grams per square meter (gsm) is under consideration. The experiments are conducted at constant pressure conditions using 2D Radial flow method. Stereo microscopy of the preform material is done for detailed study of the weaving pattern. It is concluded that plain woven fabric exhibits anisotropic behavior when tested for in-plane permeability. Permeability is found to be higher in a direction which offers more interspacing between adjacent fibers threads causing more resin to flow in this direction.

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