Journal of Radioanalytical and Nuclear Chemistry
Volume/Issue:
Volume 257: Issue 1
Crystallinity dependence of free-volume size and its distribution of ethylene-vinyl alcohol copolymer evaluated by positronium lifetime measurement
Authors:
K. Ito The University of Tokyo Graduate School of Engineering 7-3-1 Hongo Bunkyo-ku, Tokyo 113-8656 Japan

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H.-L. Li The University of Tokyo Graduate School of Engineering 7-3-1 Hongo Bunkyo-ku, Tokyo 113-8656 Japan

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Y. Saito The Nippon Synthetic Chemical Industry Co., Ltd Physics and Analysis Research Center, Central Research Laboratory 13-1, Muroyama 2- chome, Ibaraki, Osaka 567-0052 Japan

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T. Yamamoto The Nippon Synthetic Chemical Industry Co., Ltd Physics and Analysis Research Center, Central Research Laboratory 13-1, Muroyama 2- chome, Ibaraki, Osaka 567-0052 Japan

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Y. Nishihara The Nippon Synthetic Chemical Industry Co., Ltd Physics and Analysis Research Center, Central Research Laboratory 13-1, Muroyama 2- chome, Ibaraki, Osaka 567-0052 Japan

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Y. Ujihira The University of Tokyo Graduate School of Engineering 7-3-1 Hongo Bunkyo-ku, Tokyo 113-8656 Japan

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K. Nomura The University of Tokyo Graduate School of Engineering 7-3-1 Hongo Bunkyo-ku, Tokyo 113-8656 Japan

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Pages:
191–193
Online Publication Date:
31 Oct 2004
Publication Date:
17 Jul 2003
Article Category:
Research Article
DOI:
https://doi.org/10.1023/a:1024738503198
Restricted access

Abstract  

The size distribution of free-volume (<~0.1 nm3) of ethylene-vinyl alcohol copolymer with various crystalline degrees was estimated by positronium lifetime measurement. With increasing degree of crystallinity, the size distribution significantly narrowed and the intensity of positronium decreased. This indicates that the inhomogeneity reduces with the increase of the degree of crystallinity. It is found that the free-volume fraction estimated is reflected by the fraction of the amorphous region.

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Cover Journal of Radioanalytical and Nuclear Chemistry
Journal of Radioanalytical and Nuclear Chemistry
Print ISSN:
0236-5731
Online ISSN:
1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation		 1968
Volumes
per Year		 1
Issues
per Year		 12
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)

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