Journal ArticleDOI
Velocity of Sound in Liquids and Chemical Constitution
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In this paper, it was shown that the velocity of sound cannot be a proper basis of comparison in any homologous series and the result of plotting the constant R against the molecular weight of members of a homology series leads to the equation R = αM + β, where α is a general constant and β a characteristic constant for any one homology.Abstract:
A study of the recently obtained data on the velocity of sound and density in liquids reveals a simple relation between these quantities namely the law, v⅓M/ρ = R where v is the velocity of sound in the liquid, M the molecular weight, ρ the density and R a constant independent of temperature. It is shown that the velocity of sound cannot be a proper basis of comparison in any homologous series. The result of plotting the constant R against the molecular weight of members of homologous series leads to the equation R = αM + β where α is a general constant and β a characteristic constant for any one homologous series. The difference in R for successive members of homologous series is a constant independent of the series and R is an additive function of the chemical structure. Values of R for hydrogen, carbon, oxygen, bromine, and chlorine are tabulated.read more
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Journal ArticleDOI
Quantitative NDE Applied to Composites and Metals
Joseph S. Heyman,William P. Winfree,F. Raymond Parker,D. Michele Heath,Christopher S. Welch,Christopher S. Welch +5 more
TL;DR: In this paper, the authors present NDE models that were used to develop measurement technologies for characterizing the curing of a polymer system for composite materials, and a practical application of this technology is a closed feedback system for controlling autoclave processing of composite materials.
Journal ArticleDOI
Phase transition studies in polymesomorphic compounds
TL;DR: The structural parameters of the SA and SBmesophases and the phase transition of the compound N-(pn-octyloxybenzylidene)p-n-butyl aniline were investigated by X-ray diffraction as mentioned in this paper.
Book ChapterDOI
Chapter 14 – Acoustic Properties
TL;DR: In this paper, the acoustic properties of solid polymers, both from a theoretical and from a practical point of view, have been investigated, and four parameters, namely longitudinal and shear speed, local compressions and expansions, and absorption, are defined.
Journal ArticleDOI
Synthetische lineare Polymere
TL;DR: In this article, the Molekulargewichten werden multipliziert with spezifischen Schallgeschwindigkeit der Zwischenglieder, bei polymerhomologen Reihen von identischen Kettengliedern.
Journal ArticleDOI
Multifrequency ultrasonic investigations in the liquid crystal 5 OCB
TL;DR: In this paper, the temperature variation of the specific volume and ultrasonic velocity (at four different fixed frequencies) in the liquid crystal 4′-n-octyloxy-4-cyanobiphenyl (80CB) are carried out both in the nematic and isotropic phases.
References
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Journal ArticleDOI
Pressure Coefficients of Acoustic Velocity for Nine Organic Liquids
TL;DR: In this paper, a pressure supersonic interferometer was used to examine nine organic liquids at frequencies a little less than 200 kc and at temperatures varying from 22.7°C to 25.5°C for the various liquids.
Journal ArticleDOI
Die Schallgeschwindigkeiten von Lösungen und ihre Beziehungen zur Schallgeschwindigkeit des gelösten Stoffes
TL;DR: In this paper, an den Schallkennlinien von Losungen ein Extrapolationsverfahren, das die Schallgeschwindigkeit geloster Substanzen zu bestimmen gestattet, entwickelt.
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