Study of epoxy resin for cryogenic use by positron annihilation method

S. Nishijima; Y. Honda; S. Tagawa; T. Okada

doi:10.1007/bf02036260

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Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 211: Issue 1

Study of epoxy resin for cryogenic use by positron annihilation method

Authors:

S. Nishijima

S. Nishijima ISIR Osaka University 8-1 Mihogaoka 567 Ibaraki, Osaka (Japan)

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Y. Honda

Y. Honda ISIR Osaka University 8-1 Mihogaoka 567 Ibaraki, Osaka (Japan)

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S. Tagawa

S. Tagawa ISIR Osaka University 8-1 Mihogaoka 567 Ibaraki, Osaka (Japan)

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T. Okada

T. Okada ISIR Osaka University 8-1 Mihogaoka 567 Ibaraki, Osaka (Japan)

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Pages:: 93–101

Online Publication Date:: 13 Aug 2005

Publication Date:: 17 Nov 1996

Article Category:: Research Article

DOI:: https://doi.org/10.1007/bf02036260

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Abstract

The molecular state of epoxy resins for cryogenic use has been studied in terms of positron lifetime measurement. The addition of plasticizer increased the free volume in the epoxy and hence the ductility of the epoxy at room temperature was increased. The fracture toughness at cryogenic temperatures, however, decreased. The increase of molecular weight between crosslinks decreased the free volume in the epoxy at room temperature and increased the fracture toughness slightly at cryogenic temperature. Based on the data the molecular state model desired for cryogenic application was proposed and the nano-sized silica dispersed epoxy was prepared by means of sol-gel method to follow the model. The cryogenic properties of the silica dispersed epoxy and the free volume evaluated by positron annihilation lifetime were also discussed.

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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)