Surface molecular motion in polyolefin single crystals

Atsushi Sakai, Hirohiko Yakabe, Keiji Tanaka, Toshihiko Nagamura, Tisato Kajiyama

研究成果: 会議への寄与タイプ論文

抄録

In order to study an effect of underneath crystalline phase on surface molecular motion, lateral force on an isotactic polypropylene (iPP) single crystal was examined as a function of temperature. Single crystals of iPP were prepared by isothermal crystallization from a 1-chloronaphthalene solution with the concentration of 4×10 -3 wt% at 383 K for 24 h. Thermal molecular motion for a bulk iPP sample prepared by a melt-quenching method was also examined by dynamic mechanical analysis, hi the case of the single crystal surface, α a-relaxation process arisen from the segmental motion was observed at approximately 260 K, which was lower than the corresponding bulk value by about 30 K. This result indicates that surface molecular motion in the single crystal is more active than that in the bulk although the surface located on the crystalline phase is quite thin.

元の言語英語
ページ数1
出版物ステータス出版済み - 12 1 2005
イベント54th SPSJ Annual Meeting 2005 - Yokohama, 日本
継続期間: 5 25 20055 27 2005

その他

その他54th SPSJ Annual Meeting 2005
日本
Yokohama
期間5/25/055/27/05

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Polyolefins
Polypropylenes
Single crystals
Crystalline materials
Single crystal surfaces
Relaxation processes
Dynamic mechanical analysis
Quenching
Crystallization
Temperature

All Science Journal Classification (ASJC) codes

  • Engineering(all)

これを引用

Sakai, A., Yakabe, H., Tanaka, K., Nagamura, T., & Kajiyama, T. (2005). Surface molecular motion in polyolefin single crystals. 論文発表場所 54th SPSJ Annual Meeting 2005, Yokohama, 日本.

Surface molecular motion in polyolefin single crystals. / Sakai, Atsushi; Yakabe, Hirohiko; Tanaka, Keiji; Nagamura, Toshihiko; Kajiyama, Tisato.

2005. 論文発表場所 54th SPSJ Annual Meeting 2005, Yokohama, 日本.

研究成果: 会議への寄与タイプ論文

Sakai, A, Yakabe, H, Tanaka, K, Nagamura, T & Kajiyama, T 2005, 'Surface molecular motion in polyolefin single crystals', 論文発表場所 54th SPSJ Annual Meeting 2005, Yokohama, 日本, 5/25/05 - 5/27/05.
Sakai A, Yakabe H, Tanaka K, Nagamura T, Kajiyama T. Surface molecular motion in polyolefin single crystals. 2005. 論文発表場所 54th SPSJ Annual Meeting 2005, Yokohama, 日本.
Sakai, Atsushi ; Yakabe, Hirohiko ; Tanaka, Keiji ; Nagamura, Toshihiko ; Kajiyama, Tisato. / Surface molecular motion in polyolefin single crystals. 論文発表場所 54th SPSJ Annual Meeting 2005, Yokohama, 日本.1 p.
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AU - Sakai, Atsushi

AU - Yakabe, Hirohiko

AU - Tanaka, Keiji

AU - Nagamura, Toshihiko

AU - Kajiyama, Tisato

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