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Lamellar characteristics controlled by prior polymer concentration for solution-crystallized ultra-high molecular weight polyethylene
http://hdl.handle.net/10087/4817
http://hdl.handle.net/10087/4817f094814d-014e-4fc8-88de-834830703b92
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
poly425893.pdf (5.8 MB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2009-08-27 | |||||
| タイトル | ||||||
| タイトル | Lamellar characteristics controlled by prior polymer concentration for solution-crystallized ultra-high molecular weight polyethylene | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | entanglements | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | tie molecules | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | ultra-high molecular weight polyethylene | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| 著者 |
Uehara, H
× Uehara, H× Matsuda, H× Aoike, T× Yamanobe, T× Komoto, T |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The effect of prior polymer concentration on solution-crystallized morphologies in ultra-high molecular weight polyethylene has been characterized by transmission electron microscopy (TEM) and X-ray analysis. Molecular motion in crystalline and amorphous phases was evaluated by nuclear magnetic resonance (NMR) techniques. The series of solution-crystallized mats was prepared from different polymer concentrations. TEM results indicate these samples consist of lamellae aligned parallel to the mat surface. The observed high order scattering of small-angle X-ray scattering (SAXS) patterns indicate a regular stacking of lamellae. The long period was similar to 11 nm, independent of prior polymer concentration. Wide-angle X-ray diffraction analysis also revealed the same level of crystallinity for these solution-crystallized samples, well coincident with H-1-NMR results. These indicate that the thickness of crystal/amorphous layers was constant, which was also confirmed by layer thickness distribution analysis for this series of samples, based on direct TEM observation. However, the SAXS peak gradually grew and sharpened with increasing prior polymer concentration. H-1-NMR results also indicate amorphous chain mobility was restricted for the sample prepared from lower polymer concentration in spite of unchanged crystallinity and relaxation characteristics for crystalline chains. Morphological and relaxation characteristics information demonstrates that lower prior polymer concentration might prefer formation of tie molecules which connect tightly crystalline layers. In contrast, the higher concentration could trap loosely entangled chains in amorphous layers, providing for an ease of chain relaxation estimated by H-1-NMR analysis. | |||||
| 書誌情報 |
Polymer 巻 42, 号 13, p. 5893-5899, 発行日 2001-06 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0032-3861 | |||||
| 書誌レコードID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AA00776983 | |||||
| DOI | ||||||
| 関連タイプ | isVersionOf | |||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | info:doi/10.1016/S0032-3861(00)00911-3 | |||||
| フォーマット | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | application/pdf | |||||
| 著者版フラグ | ||||||
| 出版タイプ | AM | |||||
| 出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
| 出版者 | ||||||
| 出版者 | Polymer | |||||
| 資源タイプ | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | Journal Article | |||||
| 更新日 | ||||||
| 日付 | 2017-03-27 | |||||
| 日付タイプ | Created | |||||
