| Project/Area Number |
15K05629
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Polymer/Textile materials
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| Research Institution | Kobe University |
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Principal Investigator |
Sato Harumi 神戸大学, 人間発達環境学研究科, 准教授 (10288558)
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| Research Collaborator |
Ozaki Yukihiro 関西学院大学, 理工学研究科, 教授 (00147290)
Yamamoto Shigeki 大阪大学, 理学研究科, 助教 (60552784)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
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| Keywords | 水素結合 / 生分解性ポリマー / 分子量依存性 / ラメラ構造 / ポリヒドロキシブタン酸 / 生分解性高分子 / テラヘルツ分光法 / 赤外分光法 / 広角X線回折 / 小角X線散乱 / 折りたたみ構造 / 高分子構造・物性 / 分子量 |
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| Outline of Final Research Achievements |
Poly(3-hydroxybutyrate) (PHB)is biodegradable polyesters synthesized by numerous bacteria as intracellular carbon and energy storage compounds. Infrared, Raman, and THz spectroscopy, wide-angle X-ray diffraction (WAXD) studies were carried out to explore crystallization behavior and hudrogen bonding of low molecular weight PHB. Low Molecular weight PHB (Mn= 1000 and 2000) are crystallized without molecular chain folding. It was shown that the crystallization behavior is affected by the presence of a chain folding structure. In the case where the molecular chain is short and does not form a folded structure, the hydrogen bonding becomes a driving force for orienting the molecular chain to form a crystal structure, and when the molecular weight of PHB is larger than 2000-3000, the hydrogen bonding stabilizes the crystal structure.
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