Effect of aging time on a glass transition of amorphous polymers at heating

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F14%3A43871604" target="_blank" >RIV/70883521:28610/14:43871604 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985874:_____/14:00429166

Výsledek na webu

<a href="http://www.chemicke-listy.cz/docs/full/2014_s1_s59-s65.pdf" target="_blank" >http://www.chemicke-listy.cz/docs/full/2014_s1_s59-s65.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Effect of aging time on a glass transition of amorphous polymers at heating

Popis výsledku v původním jazyce

The relaxation and consolidation processes accompanying the glass transition are linked in this paper with an induction mechanism introducing a cooperative character of relaxation into those processes. The induction mechanism supplements the propositionunderlying the internal energy material clock used in a recently developed thermodynamically consistent non-linear viscoelastic theory modeling thermal and mechanical behavior of amorphous polymers in the glass transition range1,2. The mechanism is introduced into the constitutive theory framework where it replaces the stretched exponential relaxation functions. The proposed modification is used to describe the dilatometric behavior of PMMA during heating from the glassy state after varying aging times.The modified theoretical approach is found to produce a fairly good description of the peaks in thermal expansivity, both with regard to their intensity and position along the temperature axis. The length of the aging period in the glass

Název v anglickém jazyce

Effect of aging time on a glass transition of amorphous polymers at heating

Popis výsledku anglicky

The relaxation and consolidation processes accompanying the glass transition are linked in this paper with an induction mechanism introducing a cooperative character of relaxation into those processes. The induction mechanism supplements the propositionunderlying the internal energy material clock used in a recently developed thermodynamically consistent non-linear viscoelastic theory modeling thermal and mechanical behavior of amorphous polymers in the glass transition range1,2. The mechanism is introduced into the constitutive theory framework where it replaces the stretched exponential relaxation functions. The proposed modification is used to describe the dilatometric behavior of PMMA during heating from the glassy state after varying aging times.The modified theoretical approach is found to produce a fairly good description of the peaks in thermal expansivity, both with regard to their intensity and position along the temperature axis. The length of the aging period in the glass

Druh

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

CEP obor

CD - Makromolekulární chemie

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

Chemické listy

ISSN

0009-2770

e-ISSN

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Svazek periodika

108

Číslo periodika v rámci svazku

S1

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

7

Strana od-do

59-65

Kód UT WoS článku

000338630400011

EID výsledku v databázi Scopus

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