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このアイテムの引用には次の識別子を使用してください:
http://hdl.handle.net/10119/16121
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| タイトル: | Effect of acetyl substitution on the optical anisotropy of cellulose acetate films |
| 著者: | Hatamoto, Kazuya
Shimada, Hikaru
Kondo, Misaki
Nobukawa, Shogo
Yamaguchi, Masayuki |
| キーワード: | Cellulose acetate
Birefringence
Orientation
Refractive index |
| 発行日: | 2018-06-09 |
| 出版者: | Springer Nature |
| 誌名: | Cellulose |
| 巻: | 25 |
| 号: | 8 |
| 開始ページ: | 4453 |
| 終了ページ: | 4462 |
| DOI: | 10.1007/s10570-018-1890-4 |
| 抄録: | The effect of acetyl substitution on the optical properties of cellulose acetate (CA) was investigated in the present study. During hot-stretching, the absolute orientation birefringence increased with tensile stress. The stretched films with high acetyl substitution had negative orientation birefringence, whereas those with low acetyl substitution had positive orientation birefringence. Furthermore, there was a great reduction in the rate of decrease in orientation birefringence following the cessation of hot-stretching. The slow relaxation of crystal orientation was responsible for the anomalous optical anisotropy, as confirmed by two-dimensional X-ray diffraction. Moreover, the slow relaxation of orientation birefringence would greatly benefit the preparation of CA optical retardation films by hot-stretching, because it would simplify the precise control of retardation. The stress-optical coefficient in the glassy state was also evaluated, and was found to decrease with the degree of acetyl substitution. |
| Rights: | This is the author-created version of Springer Nature, Kazuya Hatamoto, Hikaru Shimada, Misaki Kondo, Shogo Nobukawa, Masayuki Yamaguchi, Cellulose, 25(8), 2018, 4453-4462. The original publication is available at www.springerlink.com, http://dx.doi.org/10.1007/s10570-018-1890-4 |
| URI: | http://hdl.handle.net/10119/16121 |
| 資料タイプ: | author |
| 出現コレクション: | c10-1. 雑誌掲載論文 (Journal Articles)
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