Termodynamické fázování v teplotě skelného přechodu

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Thermodynamic Phasing of a Glass Transition of Amorphous Polymers

Popis výsledku v původním jazyce

In this paper we model the volumetric and enthalpic response of a-PMMA during heating at constant rate through the glass transition region following an aging period of varying length. The modeling is based on a recently developed thermodynamically consistent non-linear viscoelastic theory of thermal and mechanical behavior of glassy polymers in the glass transition range. The original model is modified by replacing the stretched exponential relaxation function based on a cooperative model where the elementary events tend to occur in clusters due to mutual induction reminiscent of the mechanism underlying B-E statistics. The modified approach is found to produce good agreement with the observed temperature dependence of specific volume and enthalpy. Also the peaks in thermal expansivity and heat capacity are well described, both with regard to their intensity and position along the temperature axis.

Název v anglickém jazyce

Thermodynamic Phasing of a Glass Transition of Amorphous Polymers

Popis výsledku anglicky

In this paper we model the volumetric and enthalpic response of a-PMMA during heating at constant rate through the glass transition region following an aging period of varying length. The modeling is based on a recently developed thermodynamically consistent non-linear viscoelastic theory of thermal and mechanical behavior of glassy polymers in the glass transition range. The original model is modified by replacing the stretched exponential relaxation function based on a cooperative model where the elementary events tend to occur in clusters due to mutual induction reminiscent of the mechanism underlying B-E statistics. The modified approach is found to produce good agreement with the observed temperature dependence of specific volume and enthalpy. Also the peaks in thermal expansivity and heat capacity are well described, both with regard to their intensity and position along the temperature axis.

Druh

D - Stať ve sborníku

CEP obor

JJ - Ostatní materiály

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2006

Kód důvěrnosti údajů

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

Název statě ve sborníku

Polymer Processing Society 22nd Annual Meeting PPS

ISBN

4-9093109-2-6

ISSN

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e-ISSN

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Počet stran výsledku

1

Strana od-do

1-1

Název nakladatele

Polymer Processing Society

Místo vydání

Akron

Místo konání akce

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Datum konání akce

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Typ akce podle státní příslušnosti

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Kód UT WoS článku

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