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Open spaces in the subsurface region of polyethylene probed by monoenergetic positron beams

1998; Wiley; Volume: 36; Issue: 14 Linguagem: Inglês

10.1002/(sici)1099-0488(199810)36

1099-0488

Akira Uedono, Ryoichi Suzuki, Toshiyuki Ohdaira, T. Uozumi, M. Ban, Michihisa Kyoto, S. Tanigawa, T. Mikado,

Recycling and Waste Management Techniques

Journal of Polymer Science Part B: Polymer PhysicsVolume 36, Issue 14 p. 2597-2605 ArticleFull Access Open spaces in the subsurface region of polyethylene probed by monoenergetic positron beams A. Uedono, Corresponding Author A. Uedono Institute of Materials Science, University of Tsukuba, Tsukuba, Ibaraki 305, JapanInstitute of Materials Science, University of Tsukuba, Tsukuba, Ibaraki 305, JapanSearch for more papers by this authorR. Suzuki, R. Suzuki Electrotechnical Laboratory, 1-1-4 Umezono, Tsukuba, Ibaraki 305, JapanSearch for more papers by this authorT. Ohdaira, T. Ohdaira Electrotechnical Laboratory, 1-1-4 Umezono, Tsukuba, Ibaraki 305, JapanSearch for more papers by this authorT. Uozumi, T. Uozumi Electric Power System Technology Research Laboratories, Sumitomo Electric Industries Ltd., 1-1-3 Shimaya, Konohana-ku, Osaka 554, JapanSearch for more papers by this authorM. Ban, M. Ban Analytical Characterization Center, R & D Group, Sumitomo Electric Industries Ltd., 1 Taya-cho, Sakae-ku, Yokohama 244, JapanSearch for more papers by this authorM. Kyoto, M. Kyoto Analytical Characterization Center, R & D Group, Sumitomo Electric Industries Ltd., 1 Taya-cho, Sakae-ku, Yokohama 244, JapanSearch for more papers by this authorS. Tanigawa, S. Tanigawa Institute of Materials Science, University of Tsukuba, Tsukuba, Ibaraki 305, JapanSearch for more papers by this authorT. Mikado, T. Mikado Electrotechnical Laboratory, 1-1-4 Umezono, Tsukuba, Ibaraki 305, JapanSearch for more papers by this author A. Uedono, Corresponding Author A. Uedono Institute of Materials Science, University of Tsukuba, Tsukuba, Ibaraki 305, JapanInstitute of Materials Science, University of Tsukuba, Tsukuba, Ibaraki 305, JapanSearch for more papers by this authorR. Suzuki, R. Suzuki Electrotechnical Laboratory, 1-1-4 Umezono, Tsukuba, Ibaraki 305, JapanSearch for more papers by this authorT. Ohdaira, T. Ohdaira Electrotechnical Laboratory, 1-1-4 Umezono, Tsukuba, Ibaraki 305, JapanSearch for more papers by this authorT. Uozumi, T. Uozumi Electric Power System Technology Research Laboratories, Sumitomo Electric Industries Ltd., 1-1-3 Shimaya, Konohana-ku, Osaka 554, JapanSearch for more papers by this authorM. Ban, M. Ban Analytical Characterization Center, R & D Group, Sumitomo Electric Industries Ltd., 1 Taya-cho, Sakae-ku, Yokohama 244, JapanSearch for more papers by this authorM. Kyoto, M. Kyoto Analytical Characterization Center, R & D Group, Sumitomo Electric Industries Ltd., 1 Taya-cho, Sakae-ku, Yokohama 244, JapanSearch for more papers by this authorS. Tanigawa, S. Tanigawa Institute of Materials Science, University of Tsukuba, Tsukuba, Ibaraki 305, JapanSearch for more papers by this authorT. Mikado, T. Mikado Electrotechnical Laboratory, 1-1-4 Umezono, Tsukuba, Ibaraki 305, JapanSearch for more papers by this author First published: 07 December 1998 https://doi.org/10.1002/(SICI)1099-0488(199810)36:14 3.0.CO;2-6Citations: 18AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract Open spaces in the subsurface region (<10 μm) of very low density polyethylene were probed by a monoenergetic positron beam. From measurements of Doppler broadening spectra measurements of the annihilation radiation and the lifetime spectra of positrons as a function of incident positron energy, the size of the open spaces in the region of 0–3 μm was found to be larger than that in the deeper region. This was attributed to the cooperative motion of large segments of molecules which is activated near the surface. After the freezing in of such motions (below 230 K), although the lineshape parameter S in the bulk was almost constant, S in the region of 0–3 μm decreased with decreasing temperature. This discrepancy was associated with the presence of the open spaces with an excess content and the resultant contraction of amorphous structure near the surface. © 1998 John Wiley & Sons, Inc. J. Polym. Sci. B Polym. Phys. 36: 2597–2605, 1998 References and Notes 1 Y. C. Jean, Microchem. J., 42, 72 (1990). 2 P. J. Schultz and K. G. Lynn, Rev. Mod. Phys., 60, 701 (1988). 3 L. Xie, G. B. DeMaggio, W. E. Frieze, J. 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