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Titolo:
Studies on the free volume and the volume expansion behavior of amorphous polymers
Autore:
Hagiwara, K; Ougizawa, T; Inoue, T; Hirata, K; Kobayashi, Y;
Indirizzi:
Tokyo Inst Technol, Dept Organ & Polymer Mat, Meguro Ku, Tokyo 1528552, Japan Tokyo Inst Technol Tokyo Japan 1528552 , Meguro Ku, Tokyo 1528552, Japan Natl Inst Mat & Chem Res, Tsukuba, Ibaraki 3058565, Japan Natl Inst Mat & Chem Res Tsukuba Ibaraki Japan 3058565 aki 3058565, Japan
Titolo Testata:
RADIATION PHYSICS AND CHEMISTRY
fascicolo: 5-6, volume: 58, anno: 2000,
pagine: 525 - 530
SICI:
0969-806X(200006)58:5-6<525:SOTFVA>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
POSITRON;
Keywords:
free volume; volume expansion; amorphous polymer; positron annihilation lifetime spectroscopy;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
14
Recensione:
Indirizzi per estratti:
Indirizzo: Ougizawa, T Tokyo Inst Technol, Dept Organ & Polymer Mat, Meguro Ku, Tokyo1528552, Japan Tokyo Inst Technol Tokyo Japan 1528552 Tokyo 1528552, Japan
Citazione:
K. Hagiwara et al., "Studies on the free volume and the volume expansion behavior of amorphous polymers", RADIAT PH C, 58(5-6), 2000, pp. 525-530

Abstract

In order to estimate the free volume contribution on the volume change, weinvestigated the relationship between the volume expansion behavior by Pressure-Volume-Temperature measurement apparatus and the free volume behaviorby Positron Annihilation Lifetime Spectroscopy for some amorphous polymers. From these results, the free volume fraction of the amorphous polymers was calculated by assuming that the core volume increases at a constant rate with temperature. It was found that the amount of free volume was not constant even in the glassy state and it played a very important role in the volume expansion. (C) 2000 Elsevier Science Ltd. All rights reserved.

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Documento generato il 09/04/20 alle ore 07:33:12