Open AccessIn-Situ X-Ray Analyses of Structural Change During Drawing and Shrinking of Linear Low-Density Polyethylene Film
Author(s) -
Hiroaki Yoshizawa,
Ayaka Takazawa,
Masaki Kakiage,
Takeshi Yamanobe,
Naoki Hayashi,
Maki Hiraoka,
Hiroyasu Masunaga,
Kohki Aoyama,
Hiroki Uehara
Publication year - 2022
Publication title -
journal of robotics and mechatronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 19
eISSN - 1883-8049
pISSN - 0915-3942
DOI - 10.20965/jrm.2022.p0310
Subject(s) - small angle x ray scattering , lamellar structure , materials science , linear low density polyethylene , scattering , stacking , diffraction , crystallography , synchrotron radiation , polyethylene , x ray , in situ , synchrotron , composite material , optics , chemistry , physics , nuclear magnetic resonance , organic chemistry
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.