JRM Vol.34 No.2 pp. 310-315
doi: 10.20965/jrm.2022.p0310


In-Situ X-Ray Analyses of Structural Change During Drawing and Shrinking of Linear Low-Density Polyethylene Film

Hiroaki Yoshizawa*, Ayaka Takazawa*, Masaki Kakiage*, Takeshi Yamanobe*, Naoki Hayashi**, Maki Hiraoka**, Hiroyasu Masunaga***, Kouki Aoyama***, and Hiroki Uehara*

*Division of Molecular Science, Faculty of Science and Technology, Gunma University
1-5-1 Tenjin-cho, Kiryu, Gunma 376-8515, Japan

**Panasonic Corporation
3-1-1 Yagumonakamachi, Moriguchi, Osaka 570-8501, Japan

***Japan Synchrotron Radiation Research Institute (JASRI) / SPring-8
1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan

September 9, 2021
January 11, 2022
April 20, 2022
polyethylene, drawing, shrinking, film, in-situ X-ray analysis
<i>In-Situ</i> X-Ray Analyses of Structural Change During Drawing and Shrinking of Linear Low-Density Polyethylene Film

Stress profile and in-situ X-ray patterns recorded during drawing and shrinking for LLDPE film

Structural changes during the drawing and shrinking of linear low-density polyethylene (LLDPE) film are analyzed through in-situ X-ray measurements. A synchrotron radiation source enables simultaneous analyses combining small-angle X-ray scattering (SAXS) and wide-angle X-ray diffraction (WAXD). During drawing, the original unoriented SAXS and WAXD patterns transformed into line and spot patterns, indicating the orientation of both lamellar stacking and the molecular axis along the drawing direction. During the subsequent shrinking these patterns are retained, suggesting the tilted lamellar and molecular chains. A possible model for structural changes indicates that tie molecules between lamellae effectively transmit drawing and shrinking stresses, which contributes to desirable actuation properties.

Cite this article as:
Hiroaki Yoshizawa, Ayaka Takazawa, Masaki Kakiage, Takeshi Yamanobe, Naoki Hayashi, Maki Hiraoka, Hiroyasu Masunaga, Kouki Aoyama, and Hiroki Uehara, “In-Situ X-Ray Analyses of Structural Change During Drawing and Shrinking of Linear Low-Density Polyethylene Film,” J. Robot. Mechatron., Vol.34, No.2, pp. 310-315, 2022.
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Last updated on May. 20, 2022