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・・・

基本信息

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

项目摘要

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.

谷川组对IMAI组的水和表面活性剂混合物以及Ohta-Nonomura组进行了一项合作研究，对水和表面活性剂混合物进行了研究。 Ohta和Nonomura研究了形成的基本特性以及辅助结构的稳定性，这是软物质的特征之一。它们应用了模式扩展方法和计算机模拟，发现FDDD结构以及普通的中镜结构以及普通的中镜结构是一种稳定的热平衡结构。还发现，FDDD结构也出现在甲状腺结构和层状结构之间的过渡过程中，某些甲状腺的立方对称性被损坏。人们强调的是，这些理论预测与进行X射线散射的谷仓群的实验是一致的，并发现了一系列从Lamellar，FDDD和一个高的形态学转变。 IMAI组的实验表明，水/表面活性剂系统中的过渡动力学与块共聚物的实验完全不同。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

期刊论文数量（13）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Fluctuation Modes Prior to Lamellar-Double Gyroid Transition of a Nonionic Surfactant/Water System

非离子表面活性剂/水体系层状-双螺旋转变之前的波动模式

DOI：
发表时间：
2004
期刊：
American Institute of Physics Conference Proceedings 708
影响因子：
0
作者：
H.Sawamura;K.Toyoda;S.Urabe;M.Imai
通讯作者：
M.Imai

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

DOI：
10.1002/marc.200600344
发表时间：
2006-09
期刊：
Macromolecular Rapid Communications
影响因子：
4.6
作者：
H. Jinnai;H. Hasegawa;Y. Nishikawa;G. Sevink;M. Braunfeld;D. Agard;R. Spontak
通讯作者：
H. Jinnai;H. Hasegawa;Y. Nishikawa;G. Sevink;M. Braunfeld;D. Agard;R. Spontak

Kinetics of morphological transitions in microphase-separated diblock copolymers