Creation of A Two-dimensional Mesoscopic Quasicrystal with Dodecagonal Symmetry from An ABC Star-shaped Terpolymer

用 ABC 星形三元聚合物创建具有十二角对称性的二维介观准晶体

• 批准号: 17205021
• 负责人: MATSUSHITA Yushu
• 金额: $ 30.7万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17205021/
• 关键词: block copolymer; star-shaped terpolymer; nanophase-separated structure; Archimedean tiling; quasicrystal with dodecagonal symmetry; ミクロドメイン構造; アルキメデスタイリング構造; 階層構造

It is well-established that block copolymers with incompatible components form nanophase-separated structures in condensed system due to their self-assembling nature. Star-shaped terpolymers whose three polymer chains are branched at one junction point are known to construct anisotropic cylinder-like structures in bulk, since their junction points have to be aligned on one-dimensional lines. Bulk structures of two series of star-shaped terpolymers were studied in this work, i.e., I_<1.0>S_<1.0>P_x, I_<1.0>SyP_<2.0>(I:polyisoprene, S : polystyrene, P : poly (2-vinylpyridine), X, Y are variable parameters), Solvent-cast and annealed films were used as samples. Several periodic Archimedean tiling structures with regular polygons, (6.6.6), (4.8.8) and (4.6.12) were observed fro two series. A little more complex structure,(3.3.4.3.4)), was observed for the latter series and, furthermore, more complex tiling structure composed of triangles and squares has been observed with a light change of composition from the sample with(3.3.4.3.4). The diffraction pattern with dodecagonal symmetry was observed for the sample, though it did not have periodic unit cell, which is the evidence of the quasicrystal with dodecagonal symmetry. The size of the sides of polygons is about 50nm, which is hierarchically scaled-up size from calcogenide and dendron systems.

嵌段共聚物由于其自组装性质，在凝聚体系中形成纳米相分离结构。已知其三个聚合物链在一个接合点处支化的星形三元共聚物在本体中构造各向异性圆柱状结构，因为它们的接合点必须在一维线上对齐。本工作研究了两个系列的星形三元共聚物的本体结构，I_<1.0>S_<1.0>P_x、I_<1.0>SyP_<2.0>（I：聚异戊二烯，S：聚苯乙烯，P：聚（2-乙烯基吡啶），X、Y为可变参数）、溶剂浇铸和退火膜用作样品。从两个系列中观察到几个周期性的阿基米德镶嵌结构，具有正多边形，（6.6.6），（4.8.8）和（4.6.12）。在后一系列中观察到了稍微复杂一点的结构（3.3.4.3.4）），此外，还观察到了由三角形和正方形组成的更复杂的平铺结构，其组成与具有（3.3.4.3.4）的样品相比略有变化。在样品中观察到了具有十二方对称性的衍射花样，但没有周期性的晶胞，这是准晶具有十二方对称性的证据。多边形的边的尺寸约为50 nm，这是从钙化物和树枝化物系统分级放大的尺寸。

项目成果

Composition dependence of nanophase‐separated structures formed by star‐shaped terpolymers of the A1.0B1.0CX type

• DOI: 10.1002/polb.21241
• 发表时间: 2007-08
• 期刊: Journal of Polymer Science Part B
• 作者: A. Takano;W. Kawashima;S. Wada;K. Hayashida;S. Sato;S. Kawahara;Yoshinobu Isono;M. Makihara;N. Tanaka;D. Kawaguchi;Y. Matsushita

Three-phase hierarchical structures from AB/CD diblock copolymer blends with complemental hydrogen bonding interaction

• DOI: 10.1021/ma051156s
• 发表时间: 2005-10-18
• 期刊: MACROMOLECULES
• 影响因子: 5.5
• 作者: Asari, T;Matsuo, S;Matsushita, Y
• 通讯作者: Matsushita, Y

Hierachical Structures Formed by ABC Star-Shaped Terpolymers

ABC星形三元共聚物形成的多级结构

• 发表时间: 2006
• 作者: A;Takano
• 通讯作者: Takano

Hierarchical Morphologies Formed by ABC Star-Shaped Terpolymers

• DOI: 10.1021/ma062972i
• 发表时间: 2007-04
• 期刊: Macromolecules
• 影响因子: 5.5
• 作者: K. Hayashida;Noriyuki Saito;S. Arai;A. Takano;N. Tanaka;Y. Matsushita

Mesoscopic Quasicrystal in a Three-arm Polymeric Star

三臂聚合物星中的介观准晶体

• 发表时间: 2007
• 作者: J.Masuda;他6名;Y. Matsuhsita;Y. Matsushita;Y. Matsuhsita;Y. Matsuhsita;Y. Matsuhsita
• 通讯作者: Y. Matsuhsita