Stress Relaxation Study of Fine Structure of γ-Loss Band of Branched Polyethylene

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概要

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• The shear relaxation modulus of polyethylene samples with various degrees of branching is measured at many temperatures in the so-called γ-loss band, between -190℃ and -100℃, using a torsional stress relaxation apparatus. Three relaxations, named γ_1, γ_2 and γ_3 in order of descending temperature, are observed separately. Their master curves and relaxation spectra are determined by the method of reduced variables. The activation energies obtained from the shift factors for the γ_1-, γ_2- and γ_3-relaxations are ca. 20, 11 and 6 kcal/mol respectively. For each of these relaxations the activation energy and the shape of the spectrum are found to be independent of the crystallinity and degree of branching. Using these results, the molecular mechanisms responsible for these three relaxations are discussed.

• 社団法人応用物理学会の論文
• 1982-02-05

著者

• HIDESHIMA Teruo

  Department of Applied Physics, Faculty of Engineering, Hokkaido University

• Kakizaki Maeko

  Department Of Applied Physics Faculty Of Engineering Hokkaido University

• Yamada Yoshinori

  Department Of Applied Physics Faculty Of Engineering Hokkaido University

• Hideshima Teruo

  Department Of Applied Physics Faculty Of Engineering Hokkaido University

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