Melting and Solid-Solid Transition of Polyethylene under Pressure
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概要
- 論文の詳細を見る
The thermal behaviours of unfractionated polyethylene (PE) was observed up to 31.4 kb by differential thermal analysis, and its pressure-temperature phase diagram was obtained. The thermograms showed three signals, denoted I, II and III. Signal I, the melting of folded chain crystal, was observed up to 8 kb. Below 4 kb, signal II corresponded to the melting of orthorhombic solid; between 4〜8 kb, it corresponded to the superposition of the melting of orthorhombic solid and orthorhombic-hexagonal transition; and above 8 kb, it corresponded to the orthorhombic-hexagonal transition alone. Above 4 kb, signal III had a newly-observed flatshape for a specimen crystallized at elevated pressure, but a peak shape for a specimen crystallized at 1 b. The flat signal corresponded to the continuous melting of hexagonal solid. The effect of the molecular weight distribution which makes PE behave as a multi-component system at high pressure is discussed.
- 社団法人応用物理学会の論文
- 1980-09-05
著者
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MINOMURA Shigeru
The Institute for Solid State Physics, The University of Tokyo
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HIKOSAKA Masamichi
Department of Materials Science and Engineering, Faculty of Engineering, Yamagata University
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Seto T
Shizuoka Johoku Senior High School Shizuoka Jpn
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SETO Tsuneo
Department of Physics, Faculty of Science Kyoto University
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Minomura Shigeru
The Institute For Solid State Physics The University Of Tokyo
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Hikosaka Masamichi
Department Of Physics Faculty Of Science Tokyo Metropolitan University
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Seto Tsuneo
Department Of Physics Faculty Of Science Tokyo Metropolitan University
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