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Morphological change of crystalline polymer films by annealing: substrate‐ and heating/cooling‐rate‐dependent surface roughness
Author(s) -
Uto Yuki,
Mizobata Keisuke,
Maurya Sandeep Kumar,
Akiyama Tsuyoshi,
Nakajima Takashi
Publication year - 2017
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.6195
Subject(s) - annealing (glass) , crystallite , materials science , fourier transform infrared spectroscopy , surface roughness , surface finish , infrared microscopy , recrystallization (geology) , polymer , analytical chemistry (journal) , diffraction , polyethylene , infrared , low density polyethylene , infrared spectroscopy , optics , composite material , chemistry , metallurgy , organic chemistry , paleontology , physics , biology
We study the morphological change of crystalline polymer films by annealing using atomic force microscope, X‐ray diffraction, and Fourier transform infrared spectroscopy techniques. As typical samples, we employ high‐density and low‐density polyethylene films prepared by the cast method. After annealing at 135 ° C for 4 h, the surface roughness of polyethylene films by the atomic force microscope significantly increases, and the crystallite size by the X‐ray diffraction also shows some increase, while the Fourier transform infrared spectroscopy spectrum hardly exhibits any change. This can be well explained as a result of the growth of crystal structure by recrystallization during annealing. More interestingly, we find that the choice of the substrate and also the heating/cooling rates for annealing significantly influences the surface roughness of the films. Copyright © 2017 John Wiley & Sons, Ltd.