| Autor: |
Колупаєв, Б. Б., Колупаєв, Б. С., Клепко, В. В., Левчук, В. В., Максимцев, Ю. Р., Сідлецький, В. О. |
| Předmět: |
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| Zdroj: |
Nanosistemi, Nanomateriali, Nanotehnologii; 2021, Vol. 19 Issue 2, p315-326, 12p |
| Abstrakt: |
Using mathematical modelling, we analysed the results of studying the effect of reversible and irreversible fluidity on the value of viscoelastic moduli and energy dissipation during bulk shear strain in the megahertz frequency range in the temperature range 298 < Т< 353 K of heterogeneous systems based on polyvinylchloride (PVC), which contains as a filler nanodispersed powders of copper (Cu). It is shown that, between the relaxation bulk and shear moduli, there is a quantitative relationship; the process of converting the viscosity to both the viscoelasticity and the elasticity of the composite occurs. The limits of the application of the Maxwell–Alfrey–Frenkel equations to describe the viscoelastic properties of flexible chain polymers filled with nanodispersed metal powder in the range 0 -5.0 vol.% are established. As revealed, the relaxation time of structural subsystems is related to the viscosity and shear moduli of the systems and allows one to determine not only dissipative losses, but also indicate the operating conditions of the composite in dynamic mechanical and temperature fields. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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