| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2025-08-27 |
| タイトル |
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タイトル |
Crystal Structure of Nylon-6 α Form Established by Wide-Angle X-ray and Neutron Diffraction Data Analyses |
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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 |
Crystal structure of nylon-6 α form was already established without any doubt. We have believed it for these 70 years. This crystal structure model was proposed by Bunn et al. in 1955 (Bunn’s model) on the basis of wide-angle X-ray diffraction (WAXD) data analysis. The almost extended planar-zigzag chains of alternately upward- and downward-orientations are regularly connected by intermolecular hydrogen bonds to form a sheet plane. These sheets are stacked regularly under the space group symmetry of P21. The quantitative analyses of WAXD and WAND data, which were measured for the first time in the present study, have clarified that (i) the Bunn’s model can be constructed using the space group P21/n of higher symmetry (this revision is important in the structure-property discussion), (ii) however, their regular model cannot reproduce both of WAXD and WAND data without any dilemma, and (iii) the introduction of statistically-disordered up/down chain packing concept can reproduce these observed diffraction data consistently. As one local structure, the aggregation of domains has been proposed, where the domain itself consists of the regular chain packing but these domains are randomly aggregated together with the ±a/2 shift and a small c-axial shift to form a crystalline lamella. |
| 書誌情報 |
Polymer Journal
巻 57,
発行日 2025-08
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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/s41428-025-01094-w |
