Nuclear Magnetic Resonance Absorption of Polytetrafluoro-ethylene γ-Irradiated at High Temperatures

• Tutiya Mituaki

  Tokyo Metropolitan Isotope Research Center

抄録

The NMR spectra of PTFE irradiated at various temperatures with a dose of 1.1×10⁷ R and irradiated at 340°C with various doses were measured over the temperature range from −50°C to 50°C. In the case of PTFE irradiated with 1.1×10⁷ R, the percent crystallinity estimated from NMR spectra increased with increasing irradiation temperature up to about 300°C, but decreased abruptly above 320°C, and increased again. In the case of PTFE irradiated at 340°C, the crystalline transition temperature was shifted to a lower temperature at 1.1×10⁷ R and the NMR line shape changed into a single component at 1.1×10⁸ R. The crystal imperfections due to irradiation at 340°C were caused by high viscosity during irradiation, occlusion of low molecular degradation products, the low degree of chain fractures and probably by the structure changes such as branches, crosslinkings, etc.

収録刊行物

• Japanese Journal of Applied Physics

  Japanese Journal of Applied Physics 11 (10), 1542-1546, 1972

  The Japan Society of Applied Physics

キーワード

• General Physics and Astronomy
• General Engineering

詳細情報

• CRID: 1390282681245462528
• NII論文ID: 110003893423
• NII論文ID: 30021849647
• NII論文ID: 130003459329
• NII論文ID: 210000016437
• NII書誌ID: AA00690800
• DOI: 10.1143/jjap.11.1542
• COI: 1:CAS:528:DyaE3sXhs1Kmtw%3D%3D
• ISSN: 13474065
• ISSN: 00214922
• Web Site: https://iopscience.iop.org/article/10.1143/JJAP.11.1542
• Web Site: https://iopscience.iop.org/article/10.1143/JJAP.11.1542/pdf
• 本文言語コード: en
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