Reviews of topical problems

Nature of Poisson's ratio of amorphous polymers and glasses and its relation to structure-sensitive properties

Buryat State University, Smolina st. 24a, Ulan-Ude, 670000, Russian Federation

A review and analysis of studies concerning the nature of Poisson's ratio μ of glassy systems are presented. The value of μ is a more pronounced structure-sensitive property than are elasticity moduli. The unique relation of μ with the Gruneisen parameter is substantiated. In this connection, the interrelation of harmonic (linear) and anharmonic (nonlinear) characteristics is separately considered. Poisson's ratio proves to be a single-valued function of parameters characterizing dynamic properties and critical processes and is sensitive to the lattice dynamics and the atomic-molecular structure of glasses. The structural features of isotropic solids with the negative Poisson's ratio (coefficient of transverse deformation) are discussed.

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Fulltext is also available at DOI: 10.3367/UFNe.2019.05.038574
Keywords: coefficient of transverse deformation, interatomic interaction potential, anharmonicity, elastic constants, amorphous organic polymers, inorganic glasses
PACS: 62.20.−x, 63.20.Ry, 81.05.Kf (all)
DOI: 10.3367/UFNe.2019.05.038574
Citation: Sanditov D S "Nature of Poisson's ratio of amorphous polymers and glasses and its relation to structure-sensitive properties" Phys. Usp. 63 327–341 (2020)
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Received: 26th, March 2019, revised: 31st, May 2019, 22nd, May 2019

Оригинал: Сандитов Д Д С «Природа коэффициента Пуассона аморфных полимеров и стёкол и его связь со структурно-чувствительными свойствами» УФН 190 355–370 (2020); DOI: 10.3367/UFNr.2019.05.038574

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