振動法によるプラスチックへの放射線照射効果の研究

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  • Study on Effects of γ-Ray Irradiation on Polyethylene by a Vibration Method
  • シンドウホウ ニ ヨル プラスチック エ ノ ホウシャセン ショウシャ コウカ ノ ケンキュウ

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抄録

Young's modulus of polyethylene, γ-ray irradiated, was measured by a vibration method and effects of radiation dose, the atmosphere in which radiation is done, the thickness of samples irradiated and so forth acting on crosslinking were studied. Main results are as follows : (1) the degree of crosslinking of samples irradiated in vacuum is remarkably larger compared with that irradiated in air, (2) the thinner the samples, the lower the degree of crosslinking and (3) for thin samples irradiated in air, the proportional relationship between the degree of crosslinking and radiation dose is not held, and irradiation has complicated, rather harmful, effects on the mechanical properties such as yield stress and wear resistance. In appendix, theoretical approach is shown for a composite oscillator which consists of the sample and the reed.

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