Kinetics of structural transitions in polymeric systems ・・・properties of gyroid structure・・・

聚合物体系中结构转变的动力学・・・螺旋结构的性质・・・

• 批准号: 16340123
• 负责人: OHTA Takao
• 金额: $ 10.56万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16340123/
• 关键词: mesoscopic structure; gyroid phase; water; surfactant mixtures; mode expansion method; lamellar structure; 高分子; ミクロ相分離; 構造転移; キネテックス; ジャイロイド; 電子線トモグラフィー; 高分子共重合体; 転移キネテックス; ジャイロイド構造体; 計算機シミュレーション; 密度汎関数法; 準安定構造; 構造間転移

A cooperative research was carried out on block copolymers by Hasegawa group, on water and surfactant mixtures by Imai group and the theoretical investigation by Ohta-Nonomura group. Ohta and Nonomura studied the fundamental properties of the formation and the stability of the gyroid structure which is one of the characteristic features of soft matter.They applied the mode expansion method and computer simulations and found that Fddd structure as well as the ordinary mesoscopic structures is a stable thermal equilibrium structure whereas perforated lamellar structure is metastable. It was also found that Fddd structure appears also in the course of the transitions between gyroid structure and lamellar structure where the cubic symmetry of gyroid is broken. It is emphasized that these theoretical predictions are consistent with the experiments of Hasegawa group who carried out X-ray scattering and found a series of morphological transitions from lamellar, Fddd and gyroid structures. The experiments of Imai group showed that the transition kinetics in water/surfactant systems are quite different from those of block copolymers. Therefore, we need further theoretical and experimental investigations to clarify the universal features of the dynamics of soft matter.

长谷川组对嵌段共聚物进行了合作研究，今井组对水和表面活性剂混合物进行了合作研究，太田野村组进行了理论研究。 Ohta和Nonomura研究了软物质特征之一的螺旋结构的形成和稳定性的基本性质。他们应用模态展开方法和计算机模拟，发现Fddd结构与普通介观结构一样稳定的热平衡结构，而穿孔层状结构是亚稳态的。还发现Fddd结构也出现在螺旋结构与层状结构之间的转变过程中，此时螺旋结构的立方对称性被打破。需要强调的是，这些理论预测与长谷川小组的实验一致，他们进行了X射线散射，发现了层状、Fddd和螺旋结构的一系列形态转变。 Imai课题组的实验表明，水/表面活性剂体系的转变动力学与嵌段共聚物的转变动力学有很大不同。因此，我们需要进一步的理论和实验研究来阐明软物质动力学的普遍特征。

项目成果

Static and Dynamic Structure of Spherical Nonionic Surfactant Micelles during the Disorder-Order Transition

无序-有序转变过程中球形非离子表面活性剂胶束的静态和动态结构

• 发表时间: 2005
• 作者: M.Imai; I.Yoshida; T.Iwaki; K.Nakaya
• 通讯作者: K.Nakaya

Kinetics of morphological transitions in microphase-separated diblock copolymers

微相分离二嵌段共聚物形态转变的动力学

• 发表时间: 2004
• 作者: K.Yamada; M.Nonomura; T.Ohta
• 通讯作者: T.Ohta

3D Nanometer-Scale Study of Coexisting Bicontinuous Morphologies in a Block Copolymer/Homopolymer Blend

嵌段共聚物/均聚物共混物中共存双连续形态的 3D 纳米尺度研究

• 发表时间: 2006
• 作者: H.Jinnai; H.Hasegawa; Y.Nishikawa; G.J.Agur Sevink; M.B.Braunfeld; D.A.Agard; R.J.Spontak
• 通讯作者: R.J.Spontak

Blends of a 3-Miktoarm Star Terpolymer (3μ-ISD) of Isoprene (I) Styrene (S) and Dimethylsiloxane (D) with PS and PDMS. Effect on Microdomain Morphology and Grain Size.

异戊二烯 (I) 苯乙烯 (S) 和二甲基硅氧烷 (D) 的 3-Miktoarm 星形三元共聚物 (3μ-ISD) 与 PS 和 PDMS 的混合物对微域形态和晶粒尺寸的影响。

• 发表时间: 2005
• 作者: K.Yamauchi; S.Akasaka; H.Hasegawa; H.Iatrou; N.Hadjichristidi
• 通讯作者: N.Hadjichristidi

Polymer Crystallization from the Metstable Melt : The formation mechanism of spherulites

多稳态熔体中的聚合物结晶：球晶的形成机制

• 发表时间: 2006
• 作者: M.Imai; K.Kaji
• 通讯作者: K.Kaji