Algebraic perturbation theory for dipolar fluid mixtures in a weak external field: Application for isomerization equilibria

2002 ◽  
Vol 116 (5) ◽  
pp. 2067-2074 ◽  
Author(s):  
Gergely Kronome ◽  
István Szalai ◽  
János Liszi
Keyword(s):  
Perturbation Theory ◽  
External Field ◽  
Field Application ◽  
Fluid Mixtures ◽  
Dipolar Fluid

Theoretical study on the gigantic effect of external static electric field application on the nonlinear optical properties of 1,2,3,5-dithiadiazolyl π-radical dimers

2018 ◽  
Vol 2 (4) ◽  
pp. 785-790 ◽  
Author(s):  
Hiroshi Matsui ◽  
Masaki Yamane ◽  
Takayoshi Tonami ◽  
Takanori Nagami ◽  
Kenichiro Watanabe ◽  
...  
Keyword(s):  
Optical Properties ◽  
External Field ◽  
Electric Field ◽  
Nonlinear Optical ◽  
Theoretical Study ◽  
Field Application ◽  
Nonlinear Optical Properties ◽  
Static Electric Field ◽  
Highly Active

The promising potential of π-radical dithiadiazolyl dimers as a novel class of highly-active external-field-driven NLO switches.

scholarly journals Importance of matrix inelastic deformations in the initial response of magnetic elastomers

Soft Matter ◽  
2018 ◽  
Vol 14 (11) ◽  
pp. 2170-2183 ◽  
Author(s):  
Pedro A. Sánchez ◽  
Thomas Gundermann ◽  
Alla Dobroserdova ◽  
Sofia S. Kantorovich ◽  
Stefan Odenbach
Keyword(s):  
External Field ◽  
Polymer Matrix ◽  
Initial Response ◽  
Field Application ◽  
Magnetic Response ◽  
Magnetic Elastomers

The initial magnetic response of magnetic elastomers can be explained by irreversible polymer matrix deformations under first external field application.

scholarly journals On anisotropic mechanical properties of heterogeneous magnetic polymeric composites

2019 ◽  
Vol 377 (2143) ◽  
pp. 20180212 ◽  
Author(s):  
Dmitry Borin ◽  
Gennady Stepanov ◽  
Eike Dohmen
Keyword(s):  
Magnetic Field ◽  
Mechanical Properties ◽  
External Field ◽  
Axial Loading ◽  
Homogeneous Magnetic Field ◽  
Field Application ◽  
Direction Parallel ◽  
Shear Moduli ◽  
Planar Shear ◽  
Anisotropic Mechanical Properties

This study is devoted to the magneto-mechanical characterization of heterogeneous magnetoactive elastomers based on an elastic polydimethylsiloxane matrix with embedded spherical magnetic soft microparticles and magnetic hard microparticles of irregular shape. An issue of the anisotropic mechanical properties of these smart composites is considered. Non-magnetized and pre-magnetized specimens are characterized using a planar shear and axial loading in an externally applied homogeneous magnetic field. The field direction differs relative to the direction of the field used for the specimens pre-magnetization. Results of the different methods allow comparison of the tensile shear moduli for the samples with an initially identical composition. Obtained results demonstrate a strong correlation between the composite behaviour and orientation of the magnetic field used for the pre-magnetization of the sample relative to the external field applied to a sample during the test. Composites pre-magnetized in the direction parallel to an applied mechanical force and external magnetic field show higher magnetorheological response than composites pre-magnetized transversally to the force and the field. Application of the external field directed opposite to the direction of the pre-magnetization reduces the observed stiffening. Moreover, in this situation a softening of the material can be observed, depending on the magnitude of the external field and the field used for pre-magnetization. This article is part of the theme issue ‘Heterogeneous materials: metastable and non-ergodic internal structures’.

Some Old and New Expansions in the Perturbation Theory of Fluids

1974 ◽  
Vol 52 (20) ◽  
pp. 2022-2029 ◽  
Author(s):  
William R. Smith
Keyword(s):  
Free Energy ◽  
Distribution Function ◽  
Perturbation Theory ◽  
Radial Distribution Function ◽  
Numerical Computation ◽  
Taylor Expansion ◽  
Helmholtz Free Energy ◽  
Fluid Mixtures ◽  
Pair Potentials ◽  
Present Formalism

A general functional Taylor expansion of the Helmholtz free energy and radial distribution function is derived for fluids and fluid mixtures. This gives rise to some known results for particular choices of expansion functional. The results are presented in a form convenient for numerical computation, and some calculations of g(r) for the fluid with potential u(r) = 4ε(σ/r)12 are presented. It is suggested that the present formalism may be useful for molecules with nonspherical pair potentials, and some new results are obtained for mixtures of such molecules.

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