Polymer Science in Quasi-Two-Dimensional Systems-Analysis of Internal Structures of Polymer Ultra-thin Films with Molecular Dimensions
准二维体系中的高分子科学-分子尺寸高分子超薄膜内部结构分析
基本信息
- 批准号:09450360
- 负责人:
- 金额:$ 9.02万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (B)
- 财政年份:1997
- 资助国家:日本
- 起止时间:1997 至 1999
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Polymer thin films has attracted much attention as a basic material for fabricating nanometric structures of organic assemblies. This research project has been performed in order to reveal fundamental properties of two-dimensional polymer systems such as polymer monolayer and ultra-thin polymer films from a view of polymer science. The issues focused in this project were listed as follows.1) Chain expansion of a single polymer in two-dimensional monolayer systems By using the energy transfer method, the root square mean distance of a single polymer chain was successfully evaluated in a monolayer system. From the comparison of the experimental value of energy transfer efficiency and the simulated value for two-dimensional chains, it was revealed that the polymer chains took contracted forms in the monolayer in order to minimize free area without chain entanglement at the surface.2) Chain conformation and entanglement in two-dimensional systems Molecular weight dependence of the shear viscosity for the air/water interfacial monolayers was investigated to elucidate chain morphology in the two-dimensional plane. The viscosity was proportional to the unit power of the molecular weight, indicating that there exists little entanglement of the polymer chains and each chain is segregated in the two-dimensional system.3) Structural relaxation mechanism and dynamics in monolayersThe microscopic motion of polymer chain in a monolayer was examined by time-resolved fluorescence depolarization method, and the rotational relaxation times were evaluated in a nanosecond scale. The dynamic behavior of polymer segment in the monolayer was revealed for the first time and indicated that the mobility is predominantly governed by the cohesive force of hydrophobic chains.
聚合物薄膜作为制备有机纳米组装体的基础材料受到了广泛的关注。本研究项目的目的是从高分子科学的角度揭示二维高分子体系(如聚合物单层和超薄聚合物膜)的基本性质。本课题的主要研究内容如下:1)二维单层体系中高分子链的扩张利用能量转移法,成功地计算了单层体系中高分子链的均方根距离。从二维链的能量传递效率的实验值与模拟值的比较,结果表明,聚合物链在单层中采取收缩形式,以使自由面积最小化,而在表面没有链缠结。2)二维系统中的链构象和缠结空气/水剪切粘度的分子量依赖性。研究了水界面单层以阐明二维平面中的链形态。粘度与分子量的单位幂成正比,表明二维体系中聚合物链间几乎没有缠结,且各链处于分离状态。3)单分子膜中的结构弛豫机制与动力学采用时间分辨荧光退偏振方法研究了单分子膜中聚合物链的微观运动,并在纳秒尺度下计算了旋转弛豫时间。首次揭示了聚合物链段在单分子膜中的动态行为,并指出其运动主要受疏水链的内聚力控制。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Michiaki Mabuchi: "Structural Relaxation of Langmuir-Blodgett Films of Poly(vinyl octanal acetal) with various Tacticities" Macromolecules. 31.18. 6077-6082 (1998)
Michiaki Mabuchi:“具有各种立构性的聚(乙烯基辛醛缩醛)Langmuir-Blodgett 薄膜的结构弛豫”大分子。
- DOI:
- 发表时间:
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- 影响因子:0
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Michiaki Mabuchi: "Structural Relaxation of Ultrathin Polymer Films Prepared by the Langmuir-Blodgett Technique;Characteristics of 2D Systems" Macromolecules. 31.18. 6083-6088 (1998)
Michiaki Mabuchi:“Langmuir-Blodgett 技术制备的超薄聚合物薄膜的结构松弛;二维系统的特征”大分子。
- DOI:
- 发表时间:
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- 影响因子:0
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Y.Sakurai: "Phase Separation Morphology of a Mixed Polymer Monolayer"高分子論文集. 56. 850-854 (1999)
Y. Sakurai:“混合聚合物单层的相分离形态”聚合物论文 56. 850-854 (1999)。
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Nobuhiro Sato, Shinzaburo Ito, Kazutoshi Sugiura, and Masahide Yamamoto: "Energy Migration and Excimer Formation in Quasi-Two-Dimensional Polymer Films As Revealed by the Time-Resolved Fluorescence Depolarization Measurement"J.Phys.Chem.A. 103. 3402-3409
Nobuhiro Sato、Shinzaburo Ito、Kazutoshi Sugiura 和 Masahide Yamamoto:“时间分辨荧光去偏测量揭示的准二维聚合物薄膜中的能量迁移和准分子形成”J.Phys.Chem.A.
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- 影响因子:0
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N.Sato: "Molecular Weight Dependence of Shear Viscosity of a Polymer Monolayer" Macromolecules. (印刷中).
N.Sato:“聚合物单层剪切粘度的分子量依赖性”大分子(正在出版)。
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ITO Shinzaburo其他文献
ITO Shinzaburo的其他文献
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{{ truncateString('ITO Shinzaburo', 18)}}的其他基金
Development of polymer solar cells based on the science of conjugated polymers
基于共轭聚合物科学的聚合物太阳能电池的开发
- 批准号:
26288060 - 财政年份:2014
- 资助金额:
$ 9.02万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
New developments in polymer science through polymer chain imaging : empirical foundation research using scanning near-field optical microscopy
通过聚合物链成像实现聚合物科学的新发展:使用扫描近场光学显微镜进行实证基础研究
- 批准号:
18105005 - 财政年份:2006
- 资助金额:
$ 9.02万 - 项目类别:
Grant-in-Aid for Scientific Research (S)
Studies on Polymer Structures and Functions in Nanometric Dimensions: Challenges to Ten Nano-meters Regions by Scanning Photon Microscopy
纳米尺寸聚合物结构与功能研究:扫描光子显微镜挑战十纳米区域
- 批准号:
15205016 - 财政年份:2003
- 资助金额:
$ 9.02万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
Polymer Science from Single Chains Investigated by Scanning Photon Microscopy-Non-statistic Observation of Morphology and Molecular Assembly
扫描光子显微镜研究单链高分子科学-形态和分子组装的非统计观察
- 批准号:
12305061 - 财政年份:2000
- 资助金额:
$ 9.02万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
Development of Multi-layered Polymer Thin Films Bearing Structural Polarization and Application as Photoinduced Optical Effect Materials
具有结构偏振的多层聚合物薄膜的研制及其作为光致光学效应材料的应用
- 批准号:
10555330 - 财政年份:1998
- 资助金额:
$ 9.02万 - 项目类别:
Grant-in-Aid for Scientific Research (B).
Studies on switching mechanism of ferroelectric polymer liquid crystals by time-resolved optical waveguide spectroscopy
时间分辨光波导光谱研究铁电聚合物液晶开关机理
- 批准号:
07651105 - 财政年份:1995
- 资助金额:
$ 9.02万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Molecular Orientation and Photophysical Characteristics of Mono- and Multilayer Polymer Films
单层和多层聚合物薄膜的分子取向和光物理特性
- 批准号:
01550692 - 财政年份:1989
- 资助金额:
$ 9.02万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)
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