Fictive temperature definition
WebThe fictive temperature is the so-called true glass-transition temperature of an aged polymer [71,72], which represents the temperature at which the glass in this … WebMar 10, 2015 · By definition, Tg is a measure of the temperature range where vitrification occurs on cooling from the liquid state, and it is often taken as the midpoint of this range and defined as the intersection of the extrapolated glass and liquid lines made on …
Fictive temperature definition
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WebFictive temperatures Tf is a function of real temperature T [Tf = T for the case of T>Tg (liquid, preferentially supercooled liquid), and Tf>T for the case of T WebKnown as the fictive temperature, (Tf)1 is the temperature at which the liquid structure is frozen into the glassy state. (Tf)2 represents the fictive temperature of the glass formed by fast cooling. solid. Table of Contents. Home Science Physics Matter & Energy.
WebFeb 11, 2013 · A standard definition of fictive temperature, T f, is given in terms of its temperature derivative in that range: , where . As the system tends to equilibrium, T f → … Webthe nonlinearity parameter [8]. Although the temperature dependence for the relaxation time along the equilibrium line follows a WLF [27] or VTHF [28–30] dependence, over a limited temperature range the Arrhenius dependence shown in Eq. (2) is an adequate approximation [8]. The fic-tive temperature during sequential cooling and heating his-
Webfictive meaning: 1. invented and not true or not existing: 2. relating to writing that is about imaginary…. Learn more. Webfictive temperature is specific to the particular property of in-terest: ‘‘Fictive temperatures for the same glass in the same nonequilibrium state calculated from …
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WebFeb 8, 2024 · Glass transitions temperature was determined in 2 ways: as half of the step of the glass transition (bisector, according to ISO 11357-2:1999) and as the inflection point of the step (maximum of a derivative of the DSC signal in the glass transition region). lehigh admissions officeWebEl ordenamiento ecológico del territorio representa una actividad fundamental como objeto del diálogo intersectorial para orientar el proceso de desarrollo. La perspectiva ambiental permite ordenar el territorio, pero los alcances de esta actividad desbordan necesariamente las atribuciones de la SEMARNAP. En particular, no parece funcional la actual … lehigh aggregatesWebIt is the existence of this time scale, which led to the definition of a "fictive temperature" by Tool (Tool and Eichlin, 1931 Tool, 1946). If we call this reference or fictive temperature as 7/ (which is more accurately written as T/J) since it is time-dependent ), then the Gibb s free energy of a glass can be described in terms of three ... lehigh ag equipment allentown paWebadjective. fic· tive ˈfik-tiv. Synonyms of fictive. 1. : not genuine : feigned. 2. : of, relating to, or capable of imaginative creation. 3. : of, relating to, or having the characteristics of … lehigh admitted students dayWebMay 3, 2002 · The Journal of chemical physics. 2007. TLDR. It is shown that the enthalpy overshoot of the calorimetric glass transition is enhanced by this treatment, and this enhancement is associated with a decrease in the apparent fictive temperature TfA that is determined using theEnthalpy-matching approach. 32. lehigh admissions officersWebAug 1, 2011 · As originally conceived by Tool [13], fictive temperature is the temperature from which a liquid must be rapidly quenched to produce a particular structural state of the glass at low temperature. In other words, if a glass is brought to a temperature T = Tf, it will be in equilibrium. lehigh air gun ammoWebFictive Temperature • Introduced by Tool, NBS (1946) • Describes the contribution of structural relaxation to a property, expressed in units of temperature • In equilibrium: T fic=T and dT fic/dT=1 • For glass with ‘frozen structure’: T fic=const. and dT fic/dT=0 • Not a fundamental property, but a conceptual view time Temperature ... lehigh ahl team