Glass transition in polymers: (In)correct determination of activation energy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F13%3A39896436" target="_blank" >RIV/00216275:25310/13:39896436 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.sciencedirect.com/science/article/pii/S0032386113000219" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0032386113000219</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.polymer.2013.01.002" target="_blank" >10.1016/j.polymer.2013.01.002</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Glass transition in polymers: (In)correct determination of activation energy

Popis výsledku v původním jazyce

The possibility of applying Kissinger-type equations for the evaluation of apparent activation energy in the case of the glass transition phenomenon was investigated. Theoretically simulated data based on the generally accepted Tool-Narayanaswamy-Moynihan model were used to represent all possible cases of structural relaxation behavior. The values of apparent activation energy determined by Kissinger-type equations were in major disagreement with the original values of Delta h* used as the input data for the simulations. In addition, a large dependence of the Delta h* evaluations on the thermal history of the glass was found in the case of all tested equations. The latter points to a significant systematic error in the currently commonly accepted methodology, resulting in a fundamental contradiction with the principle/concept of activation energy as a physico-chemical quantity. In light of these facts, usage of Kissinger-type equations for the evaluation of the "glass transition activa

Název v anglickém jazyce

Glass transition in polymers: (In)correct determination of activation energy

Popis výsledku anglicky

The possibility of applying Kissinger-type equations for the evaluation of apparent activation energy in the case of the glass transition phenomenon was investigated. Theoretically simulated data based on the generally accepted Tool-Narayanaswamy-Moynihan model were used to represent all possible cases of structural relaxation behavior. The values of apparent activation energy determined by Kissinger-type equations were in major disagreement with the original values of Delta h* used as the input data for the simulations. In addition, a large dependence of the Delta h* evaluations on the thermal history of the glass was found in the case of all tested equations. The latter points to a significant systematic error in the currently commonly accepted methodology, resulting in a fundamental contradiction with the principle/concept of activation energy as a physico-chemical quantity. In light of these facts, usage of Kissinger-type equations for the evaluation of the "glass transition activa

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

<a href="/cs/project/GPP106%2F10%2FP035" target="_blank" >GPP106/10/P035: Relaxační procesy v nekrystalických materiálech</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Polymer

ISSN

0032-3861

e-ISSN

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Svazek periodika

54

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

1504-1511

Kód UT WoS článku

000315746300006

EID výsledku v databázi Scopus

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