FINE STRUCTURE OF THE III-I TRANSITION AND MOLECULAR MOTION IN POLYTETRAFLUOROETHYLENE.

Kazumi Matsushige, Ryosuke Enoshita, Touru Ide, Noriyoshi Yamauchi, Seiji Taki, Tetuo Takemura

Research output: Chapter in Book/Report/Conference proceedingChapter

37 Citations (Scopus)

Abstract

The fine structure in the III-I transition region and the molecular motion of polytetrafluoroethylene under high pressure have been studied by X-ray diffraction and nuclear magnetic resonance. In the transition region from the high pressure phase III to phase I, two kinds of crystals were observed to coexist over a considerably wide temperature range. This fact suggests that the abnormal attenuation of ultrasonic waves reported in this transition region is due to a density fluctuation of these crystals. Also, a detailed study on the molecular chain conformation and the molecular motion in phase I revealed that there exists in the higher temperature region of phase I a new region, where the molecules have apparently a planar zigzag conformation as a result of right-handed and left-handed helical thermal motions in molecular chains.

Original languageEnglish
Title of host publicationJpn J Appl Phys
Pages681-687
Number of pages7
Volume16
Edition5
Publication statusPublished - 1977 May
Externally publishedYes

Fingerprint

Polytetrafluoroethylenes
Conformations
Crystals
Ultrasonic waves
Nuclear magnetic resonance
X ray diffraction
Temperature
Molecules
Hot Temperature

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Matsushige, K., Enoshita, R., Ide, T., Yamauchi, N., Taki, S., & Takemura, T. (1977). FINE STRUCTURE OF THE III-I TRANSITION AND MOLECULAR MOTION IN POLYTETRAFLUOROETHYLENE. In Jpn J Appl Phys (5 ed., Vol. 16, pp. 681-687)

FINE STRUCTURE OF THE III-I TRANSITION AND MOLECULAR MOTION IN POLYTETRAFLUOROETHYLENE. / Matsushige, Kazumi; Enoshita, Ryosuke; Ide, Touru; Yamauchi, Noriyoshi; Taki, Seiji; Takemura, Tetuo.

Jpn J Appl Phys. Vol. 16 5. ed. 1977. p. 681-687.

Research output: Chapter in Book/Report/Conference proceedingChapter

Matsushige, K, Enoshita, R, Ide, T, Yamauchi, N, Taki, S & Takemura, T 1977, FINE STRUCTURE OF THE III-I TRANSITION AND MOLECULAR MOTION IN POLYTETRAFLUOROETHYLENE. in Jpn J Appl Phys. 5 edn, vol. 16, pp. 681-687.
Matsushige K, Enoshita R, Ide T, Yamauchi N, Taki S, Takemura T. FINE STRUCTURE OF THE III-I TRANSITION AND MOLECULAR MOTION IN POLYTETRAFLUOROETHYLENE. In Jpn J Appl Phys. 5 ed. Vol. 16. 1977. p. 681-687
Matsushige, Kazumi ; Enoshita, Ryosuke ; Ide, Touru ; Yamauchi, Noriyoshi ; Taki, Seiji ; Takemura, Tetuo. / FINE STRUCTURE OF THE III-I TRANSITION AND MOLECULAR MOTION IN POLYTETRAFLUOROETHYLENE. Jpn J Appl Phys. Vol. 16 5. ed. 1977. pp. 681-687
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