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- Article name
- Definition of thermodynamic parameters of straining processes of polymeric and composite materials
- Authors
- KRIVOLUTSKAYA I. I., , jasam@jasam.ru, Moscow Aviation Institute (State Technical University), Moscow, Russia
ANDREEVA E. I., , izdanie@vimi.ru, All-Rusian Rescarch Institute for Inter-industry Information, Moscow, Russia
VAINSTEIN E. F., , mangust2337@mail.ru, N. M. Emanuel Institute of Biochemical Physics of RAS, Moscow, Russia
ZHARKIKH L. A., , izdanie@vimi.ru, All-Russian Scientific Research Institute of Inter-industry Information, Moscow, Russia
- Keywords
- polymers / composite materials / straining / processes passing by Gibbs / absolute temperature / free energy change / enthalpy change / entropy change / mainly energetic (enthalpy) processes / mainly entropy processes / equilibrium constant / universal gas constant
- Year
- 2015 Issue 4 Pages 34 - 38
- Code EDN
- Code DOI
- Abstract
- Division of physical and chemical processes proceeding under straining of samples of polymeric and composite materials in condition described by Gibbs, on mainly energetic (enthalpy), mainly entropy and processes, in which contributions in change of free energy (energy or entropy or their changes) are compared, was considered. It was shown that boundary between mainly energetic and mainly entropy processes is defined by basic equation of equilibrium thermodynamics: enthalpy change is entropy change at given absolute temperature (∆H = T∆S). It was established that at consideration of straining processes kinds of loading (tension, compression, bending etc.) defining by mechanical destruction and availability of weak (intermolecular) bonds in samples is necessary to take into account. It was revealed that of samples with different space structure which is distinguished from space structure of initial sample can obtain in process of samples straining. It was noted that process heat which is equal enthalpy change taken with opposite sign and entropy change which depends on change of spatial location of atoms in the chemical reaction practically donґt depend on time and site of reaction proceeding. Parameters of straining processes (enthalpy change and entropy change) materials samples which exist in different states were defined. Examples of samples thermodynamic parameters definition were listed.
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