Mechanical Dispersion and Molecular Motion in Crystals of Polyethylene and Other Polymers

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概要

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• Dynamic mechanical loss of solution-grown polyethylene crystals is measured by the suspension method as a function of temperature and the crystalline dispersion (α dispersion) is observed above 40℃ in just the same manner as in melt-grown polyethylene. In the temperature range of this dispersion, the ratio of crystal lattice constants b/a progressively changes toward that of a higher symmetry hexagonal form with increasing temperature. NMR line width of the broad component becomes gradually narrow with rising temperature in this temperature range. It is concluded from these reasons that the α dispersion of polyethylene should be ascribed to the rotational vibration of chain molecules in crystalline phase about c-axis. Similar behavior of low molecular weight paraffin crystals below the rotational transition point affords an additional confirmation of the above conclusion. Crystalline dispersions of other polymers are briefly discussed.

• 社団法人応用物理学会の論文
• 1962-11-15

著者

• TERADA Hiroshi

  Department of Applied Biological Sciences, Faculty of Agricultural Science, Nagoya University

• Tsuge Kenji

  Department Of Applied Physics Faculty Of Engineering University Of Tokyo

• OZAWA Yoshiyuki

  Department of Radiology, Nagoya City University Graduate School of Medical Sciences

• Enjoji Hideo

  Department Of Applied Physics Faculty Of Engineering University Of Tokyo

• WADA Yasuku

  Department of Polymer Materials Engineering

• Ozawa Yoshiyuki

  Department Of Applied Physics Faculty Of Engineering University Of Tokyo

• Wada Yasuku

  Department Of Applied Physics Faculty Of Engineering University Of Tokyo

• Terada Hiroshi

  Department Of Applied Physics Faculty Of Engineering University Of Tokyo

• Terada Hiroshi

  Department Of Applied Biological Sciences Faculty Of Agricultural Science Nagoya University

• Tsuge K.

  Department of Applied Physics, Faculty of Engineering University of Tokyo

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