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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/12868

Title: The effect of flexible chains on the orientation dynamics of small molecules dispersed in polymer films during stretching
Authors: Nobukawa, Shogo
Aoki, Yoshihiko
Fukui, Yoshiharu
Kiyama, Ayumi
Yoshimura, Hiroshi
Tachikawa, Yutaka
Yamaguchi, Masayuki
Keywords: Additive orientation
Birefringence
Flexible chain
Nematic interaction
Stretching
Issue Date: 2014-12-24
Publisher: Nature Publishing Group
Magazine name: Polymer Journal
Volume: 47
Number: 4
Start page: 294
End page: 301
DOI: 10.1038/pj.2014.126
Abstract: The effect of flexible chain on orientation dynamics of a small additive molecule in cellulose acetate propionate (CAP) films is investigated during stretching by means of measurements of birefringence and polarized Fourier-transform infrared (FT-IR) spectrum. The orientation birefringence is enhanced by the additives such as ethylene 2,6-naphthalate (C_2Np) and hexamethylene 2,6-naphthalate (C_6Np) oligomers, suggesting that the additives orient parallel to the CAP chain due to an intermolecular orientation correlation called as the nematic interaction (NI). At a high drawing temperature, the orientation of C_2Np is stronger than that of C_6Np, indicating that the flexible alkyl chain reduces the intermolecular NI with CAP. In contrast, C_6Np orients to the stretching direction rather than C_2Np at a low temperature. The polarized FT-IR spectra show that the orientation of rigid part in C_6Np is delayed from that of the flexible group and matrix CAP chain. Consequently, the contribution of C_6Np to birefringence and its wavelength dependence become stronger with increasing the draw ratio.
Rights: Copyright (C) 2014 The Society of Polymer Science, Japan. Shogo Nobukawa, Yoshihiko Aoki, Yoshiharu Fukui, Ayumi Kiyama, Hiroshi Yoshimura, Yutaka Tachikawa and Masayuki Yamaguchi, Polymer Journal, 47(4), 2014, 294-301. http://dx.doi.org/10.1038/pj.2014.126
URI: http://hdl.handle.net/10119/12868
Material Type: author
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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