Viscosity and Density Measurements on Liquid n-Heptadecane at High Pressures

Abstract A technique was developed for vulcanizing cylinders of rubber 0.5 inch in diameter and up to 1 inch long at pressures as high as 150,000 pounds per square inch, using a small laboratory press (8-inch square platens). The specially designed mold was made of alloy steel according to general principles from the high pressure work of Bridgman. It was prestressed at 200,000 pounds per square inch. The temperature in the mold cavity was carefully calibrated with thermocouples to determine the equivalent length of cure of the test-specimens. Cylinders of GR-S tread stock were vulcanized for a range of cures at 1000, 20,000, 50,000, and 100,000 pounds per square inch. GR-S gum stock and Hevea gum and tread stocks were vulcanized for a range of cures at 100,000 pounds per square inch. Control specimens were cured in a regular type of mold, for which the pressure was not determined. All the volume compression during vulcanization is recovered when the pressure is released. This was determined by precise density measurements of the test-specimens. The electrical resistivity, dynamic modulus, internal friction, and resilience of the test-specimens were determined and the results are discussed.

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Erratum to “Viscosity and density measurements on liquid n-tetradecane at moderately high pressures” [Fluid Phase Equil. 453 15 December 2017 46–57]

Fluid Phase Equilibria ◽

10.1016/j.fluid.2017.11.014 ◽

2018 ◽

Vol 456 ◽

pp. 203 ◽

Cited By ~ 1

Author(s):

Tania V.M. Santos ◽

Marta F.V. Pereira ◽

Helena M.N.T. Avelino ◽

Fernando J.P. Caetano ◽

Jo∼ao M.N.A. Fareleira

Keyword(s):

High Pressures ◽

Fluid Phase ◽

Density Measurements

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Viscosity and density measurements of aqueous amines at high pressures: MDEA-water and MEA-water mixtures for CO2 capture

The Journal of Chemical Thermodynamics ◽

10.1016/j.jct.2016.03.021 ◽

2016 ◽

Vol 98 ◽

pp. 231-241 ◽

Cited By ~ 24

Author(s):

Manuel Sobrino ◽

Eduardo I. Concepción ◽

Ángel Gómez-Hernández ◽

M. Carmen Martín ◽

José J. Segovia

Keyword(s):

Co2 Capture ◽

High Pressures ◽

Density Measurements ◽

Aqueous Amines

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Aberrations from the ideal gas laws in systems of one and two components

Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character ◽

10.1098/rspa.1926.0012 ◽

1926 ◽

Vol 110 (753) ◽

pp. 198-232 ◽

Cited By ~ 6

Keyword(s):

Carbon Dioxide ◽

Water Vapour ◽

Room Temperature ◽

High Pressures ◽

Ideal Gas ◽

Component Mixture ◽

Gaseous Mixtures ◽

Density Measurements ◽

Two Component ◽

The Individual

The principal object of the research described in this paper was a measurement of the deviations from Dalton’s Law in gaseous mixtures. Such measurements have been made at low pressures by Maass and Morrison* and Sivertz in this laboratory and at high pressures by Masson and Dolley. They worked, however, only at room temperature. It was desired to investigate systems containing water vapour as one component, and this entailed using higher temperatures. An apparatus was devised in which density measurements could be carried out with an accuracy of at least 0·1 per cent, at temperatures up to 200° C. and pressures up to 1 atmosphere, either on a two-component mixture or on a single substance, whether liquid at room temperature or not. The two-component systems studied were water-carbon dioxide and water- ammonia. As a preliminary to their investigation, it was necessary to determine the density values for the individual components over the desired temperature range. This was done with particular care for water vapour, not only to form a basis for the later measurements, but in the hope of throwing light on the question of the molecular complexity of water in the vapour state, a question which has been the subject of several recent papers.* In the case of carbon dioxide the density measurements were carried out over the whole range from 200° C. to —70° C., those at the lower temperatures being made with an older apparatus of somewhat different design. These are considered to be accurate to 0·05 per cent., and they have been used to test a new equation of state which the authors have developed.

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