Determinations of Density-Difference and Degree of Crystallinity in Oriented Polyethylene by X-Ray Small-Angle Scattering

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概要

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• In a lamellar structure with a density-difference between crystalline and non-crystalline layers, a new method for simultaneous determinations of the degree of crystallinity and the density-difference is proposed. This method utilizes the temperature dependent intensities of X-rays scattered through small angles on the basis of the idea that the temperature dependent parameters of the structure are both the density-difference and the non-crystalline layer-thickness. As an application of the method, drawn and well-annealed polyethylene is examined between -190 and 125℃. The volume-fraction crystallinity or the non-crystalline specific volume is determined as a function of temperature. The glass-like transitions are found at -123, -35 and 28℃. Above 55℃, the partial melting occurs and it is thermally reversible. During premelting, the thermally reversible tilting of the crystalline axis is found.

• 社団法人応用物理学会の論文
• 1976-02-05

著者

• HARA Tetsuhiko

  Department of Physics, Faculty of Science, Yamaguchi University

• Hara Tetsuhiko

  Department Of Physics Faculty Of Science University Of Kyoto:(present Address) Department Of Physics

• Hara Tetsuhiko

  Department Of Science Faculty Of Literature And Science Yamaguchi University

関連論文

• Rotator Phase Transition through an Intermediate State in Odd n-Alkanes:In Situ Optical Observation Study
• Phase Transformation and Deformation Processes in Oriented Polyethylene
• Crystal Structure of A New Form of High-Density Polyethylene, Produced by Press
• Determinations of Density-Difference and Degree of Crystallinity in Oriented Polyethylene by X-Ray Small-Angle Scattering

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