Investigation of the viscoelastic properties of metal-pigmented polyvinyl chloride by the potentials of the inter-and intramolecular interactions occurring in it

Колупаев, Б. Б.

doi:10.1007/s10891-007-0026-8

Cited by 4 publications

(10 citation statements)

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“…If we suppose that, on the filler particle of radius R , a PL appears in the form of a globular layer of the effective thickness Δ l and then (at 0 < ϕ ≤ ϕ cr ) there is a polymer in bulk, then (6) where M s , M p , M f is the mass of the HPS, of the polymer in bulk, and of the filler, respectively, and N i is the quantity of the filler particles.…”

Section: B B Kolupaevmentioning

confidence: 99%

“…Let us estimate the effective density ρ1 of the PL taking into account relation (5) on the assumption that the value W 3 (Δl), according to (2) and (9), as well as the statistical distribution of the surface active centers and their interaction with the polymer (12) where W 0 characterizes the energy of the polymer-filler interaction resulting from intermolecular and interatomic interactions of various nature [6], β depends on the number of active centers of the filler surface [1], and v is determined by the value of the polymer chain flexibility [3].…”

Section: B B Kolupaevmentioning

confidence: 99%

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Influence of surface layers on the formation of the electrophysical properties of heterogeneous polymer systems

Колупаев¹

2008

Surf. Engin. Appl.Electrochem.

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There is investigated the role of polymer layers on the metal surface of a fine filler in the formation of a PVC system with electrophysical properties. It is shown that a physicochemical polymer modification takes place under the surface active center influence. Thus, the surface layer properties (density and geometrical characteristics) differ from the PVC ones. The correlation between the electrophysical properties of the PVC composite and the surface layer in the range of the fine copper fraction of 0-11.3 vol % at E ≤ 10 6 V m -1 and a frequency response of 20-2 × 10 5 Hz is determined. An explanation of the investigated relation is presented.

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Section: B B Kolupaevmentioning

confidence: 99%

Section: B B Kolupaevmentioning

confidence: 99%

Influence of surface layers on the formation of the electrophysical properties of heterogeneous polymer systems

Колупаев¹

2008

Surf. Engin. Appl.Electrochem.

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“…which enables us to consider, using phonon-photon interaction, the diffusion mechanism of heat conduction of flexiblechain polymers on the basis of molecular-radiation transfer theory [10] from the frequency shift of the vibrational spectrum of polyvinylchloride (poly(vinyl butyral)) [28]. For this purpose, we assume, following [29], that photons produce a nonequilibrium energy distribution of structural elements as material particles of a body.…”

mentioning

confidence: 99%

“…The samples were prepared by the method of hot pressing in the temperature-pressure regime at 403 K (polyvinylchloride) or 393 K (poly(vinyl butyral)) and p = 10.0 MPa. The temperature dependence of λ and C p was determined using modified IT-λ-400 and IT-C p -400 units [28] for a heating rate of a sample of 3 grad ⁄ min. Taking account of the body's isotropy [12], we have…”

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confidence: 99%

“…3. Dependences of the diffusion λ 3 (1-3) and photon λ 4 (4-6) thermal conductivities of polyvinylchloride (1, 2, 4, and 5) and poly(vinyl butyral) (3 and 6) on the temperature T at different values of the characteristic temperature Z m : 1 and 2) Z lon = 162 K; 2 and 5) Z tr = 73 K; 3 and 6) Z tr = 55 K. creases because of absorption and scattering and increases due to the scattering of the return flux and secondary radiation [28].…”

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Mechanisms of heat transfer on polyvinylchloride and poly(vinyl butyral)

Колупаев

Klepko

Lebedev

2012

J Eng Phys Thermophy

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Results of experimental investigation and estimates of the contributions of the phonon, diffusion, and photoncomponents of thermal conductivity of polyvinylchloride and poly (vinyl butyral) in the range 290 K ≤ T ≤ T v + 40 K have been presented. It has been shown that the phonon mechanism of heat transfer predominates at 293 K ≤ T < T v , and the diffusion mechanism, when T ≥ T v . The value of the photon component of thermal conductivity nonlinearly decreases throughout the T range.Introduction. The quantitative characteristic of the efficiency of the process of transfer of thermal energy from a more heated part of a body to a less heated part is its thermal-conductivity coefficient λ.Pioneering works on investigation of λ of dielectrics, among which are most of the organic polymers, belong to P. Debye, R. Peierls, K. Eierman, P. Klemens, et al. The history and works on this issue up to 1978 have been reviewed by I. I. Perepechko in [1] and up to 1982, by Yu. K. Godovskii in [2], where it has been indicated that most of the carried-out investigations sought to establish the dependence of λ on the structure, the chemical composition, and the temperature of condensed media. For amorphous polymers, the most developed is the Eierman model [3]; however, it has a number of substantial drawbacks [4] and is inapplicable to systems with a complex structure. Since heat conduction in its physical meaning characterizes the capability of a body for transferring thermal energy through the interaction of atoms, atomic groups, and parts of macromolecules [5], the value of λ is largely determined by the intensity and character of intra-and intermolecular interaction. Theories concerning the heat conduction of polymers use the model approach characteristic of liquids [6] and/or the scattering of phonons, which are considered as heat carriers only conventionally [7]. In this case phonons as carriers of thermal energy of a body [8] interact with each other via nonlinear properties of a medium [9]. This leads to an energy redistribution between shear and longitudinal vibrations of structural elements, whereas the macroscopic flow of kinetic energy appears as the heat flux [10]. One recognizes [11] three characteristics of thermal motion in polymers: fast relaxation processes -motion of parts of a macromolecule, side chains, or individual atomic groups, sharp increase in segmental mobility (principal relaxation region), and viscous-friction background [12]. It has been proved [13] that the entire spectrum of interchain vibrations can be represented by one parameter, i.e., the characteristic temperature of a body θ. Klemens [7] has assumed that the major contribution to the low-temperature thermal conductivity is made by longitudinal waves (longitudinal phonons). The process of transformation of longitudinal waves into transverse waves limits the mean free path of a phonon, which affects the character of the dependence λ = f(T) [1]. However, this brings up a number of unsolved problems associated with the introduction and selection ...

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Thermal Fluctuations of Electromagnetic Field in the PVC Filled with Micro- and Nanodisperse Graphite

Колупаев¹,

Kolupaev²,

Levchuk³

et al. 2018

Metallofiz. Noveishie Tekhnol.

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Investigation of the viscoelastic properties of metal-pigmented polyvinyl chloride by the potentials of the inter-and intramolecular interactions occurring in it

Cited by 4 publications

References 1 publication

Influence of surface layers on the formation of the electrophysical properties of heterogeneous polymer systems

Influence of surface layers on the formation of the electrophysical properties of heterogeneous polymer systems

Mechanisms of heat transfer on polyvinylchloride and poly(vinyl butyral)

Thermal Fluctuations of Electromagnetic Field in the PVC Filled with Micro- and Nanodisperse Graphite

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