| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2025-11-18 |
| タイトル |
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タイトル |
Structural Disorders in the α and γ Forms and Iodine-Complex of Nylon-6 and Their Transition Mechanism |
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言語 |
en |
| 言語 |
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言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 著者 |
Tashiro Kohji
Kurihara Kazuo
Tamada Taro
Kusaka Katsuhiro
Sakakura Terutoshi
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| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
Nylon-6 displays several forms of crystal modification. The α form converts to the iodine complex when immersed in a highly concentrated KI/I2 solution. Following de-iodization in a hypo (sodium thiosulfate) solution, the iodine complex changes to the γ form. The phase transition mechanism from the α to the γα form through the iodine complex has remained a perplexing issue due to not-yet-established crystal structures. As previously reported, a quantitative analysis of 2D-wide-angle X-ray and neutron diffraction data necessitated a revision of the crystal structure of the α form by incorporating up/down chain packing disorder. This paper presents findings that a similar up/down chain disorder is also present in the crystal lattices of the γ form and the iodine complexes. In both the α and γ forms, the crystal lattice is composed of stacked hydrogen-bonded sheet planes. The aforementioned up/down chain packing disorder can be expressed in terms of the stacking disorder of sheets or the disordered slippages of sheets along the a axis. Thus, the notion of stacking disorder of sheet planes allows for a systematic and coherent interpretation of the transition behaviors among these crystalline forms of nylon-6. |
| 書誌情報 |
Polymer Journal
発行日 2025-11
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| 出版者 |
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出版者 |
Springer Nature |
| DOI |
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識別子タイプ |
DOI |
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関連識別子 |
10.1038/s41428-025-01110-z |
