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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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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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)