Společná objemová a entalpická relaxační odezva iniciovaná teplotním sestupným skokem

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

Simultaneous Volume and Enthalpy Relaxation Response Initiated by Temperature Down-Jump

Popis výsledku v původním jazyce

The volume and enthalpy relaxation, so called structural relaxation or physical aging phenomenon were measured after temperature down-jump from equilibrium above glass transition temperature to glassy state. The tested materials were PMMA, PS, amorphousPET and PMMA filled with carbon black. Mercury-in-Glass Dilatometer was employed for volume relaxation measurements and Perkin-Elmer DSC 1 Pyris was used for enthalpy relaxation measurements. The relaxation data were collected from minutes after temperature jump to nearly a month. It was found that enthalpy and volume relax by very similar way, which means that constant relationship between both quantities can be found defined one time independent ratio over relaxation times of above described experimental window. It was found that its value is close to the inversion value of compressibility measured by direct compression giving value for tested polymers to be around 2GPa.

Název v anglickém jazyce

Simultaneous Volume and Enthalpy Relaxation Response Initiated by Temperature Down-Jump

Popis výsledku anglicky

The volume and enthalpy relaxation, so called structural relaxation or physical aging phenomenon were measured after temperature down-jump from equilibrium above glass transition temperature to glassy state. The tested materials were PMMA, PS, amorphousPET and PMMA filled with carbon black. Mercury-in-Glass Dilatometer was employed for volume relaxation measurements and Perkin-Elmer DSC 1 Pyris was used for enthalpy relaxation measurements. The relaxation data were collected from minutes after temperature jump to nearly a month. It was found that enthalpy and volume relax by very similar way, which means that constant relationship between both quantities can be found defined one time independent ratio over relaxation times of above described experimental window. It was found that its value is close to the inversion value of compressibility measured by direct compression giving value for tested polymers to be around 2GPa.

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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