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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/12980

Title: Development of Microporous Structure and its Application to Optical Film for Cellulose Triacetate Containing Diisodecyl Adipate
Authors: Shimada, Hikaru
Nobukawa, Shogo
Yamaguchi, Masayuki
Keywords: Cellulose triacetate
Optical Film
Microporous structure
Issue Date: 2014-12-09
Publisher: Elsevier
Magazine name: Carbohydrate Polymers
Volume: 120
Start page: 22
End page: 28
DOI: 10.1016/j.carbpol.2014.11.056
Abstract: Phase separation in plasticized cellulose triacetate (CTA) films is investigated to produce a microporous film that can be used in optical devices. Hot-stretched CTA films containing diisodecyl adipate (DIDA) show negative orientation birefringence similar to the hot-stretched pure CTA. After extracting DIDA from the stretched films by immersion into an organic solvent, however, the films exhibit positive birefringence. Moreover, the magnitude of the birefringence increases with the wavelength, known as extraordinary dispersion, which is an essential property in the preparation of an ideal quarter-wave plate. Numerous ellipsoidal pores with micro-scale were detected in the film after the immersion, indicating that DIDA were segregated and formed ellipsoidal domains in the CTA matrix during annealing and stretching. These results indicate that extraordinary wavelength dispersion is given by the combinations of orientation birefringence from CTA and form birefringence from micropores. Furthermore, it was found that annealing time and stretching condition affect the phase separation as well as the shape and size of pores.
Rights: Copyright (C)2014, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International license (CC BY-NC-ND 4.0). [http://creativecommons.org/licenses/by-nc-nd/4.0/] NOTICE: This is the author's version of a work accepted for publication by Elsevier. Hikaru Shimada, Shogo Nobukawa, Masayuki Yamaguchi, Carbohydrate Polymers, 120, 2014, 22-28, http://dx.doi.org/10.1016/j.carbpol.2014.11.056
URI: http://hdl.handle.net/10119/12980
Material Type: author
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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