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Predicting the Phase-separating Patterns of Confined Complex Polymers System

Author: PanJunXing
Tutor: ZhangJinJun
School: Shanxi Normal University
Course: Atomic and Molecular Physics
Keywords: Soft materials Self-assembly Confined Cell dynamical system method (CDS) Time-Depended Ginzburg-Landau Equation (TDGL)
CLC: O469
Type: Master's thesis
Year: 2010
Downloads: 11
Quote: 0
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Abstract


Soft materials are closely related to a variety of industrial technologies and human life. Their self-assembly behavior has a very important prospect. All of them, the rich self-assembly structures of confined complex polymer system play an important role in promoting the micro processing technology and the design of new nano-materials. It has attracted a large number of researchers and has been a hot topic in the soft matter physics field. This study is mainly focus on the self-assembly behavior of confined complex polymers. The Ginzburg-Landau equations and cell dynamical system simulation (CDS) were used to study the domain structure and growth kinetics mechanism of phase separation in confined complex polymer systems.First, by using the TDGL/CDS methods, we study the separation structures and the domain growth kinetics of di-diblock copolymer mixtures confined in two attractive flats. The results showed that a macrophase separation and a microphase separation all occur under the confined of the flats. What is more important, we observed an orientation reverse of ordered structures with the changes of attract strength between two flats and interaction strength between different blocks. This conclusion has a certain significance to achieve an orderly transition structure experimentally, and provide the possibility of discovery and synthesis of new properties and materials.Second, on the basis of binary mixtures phase separation, more complex colloidal rods are added, we give a preliminary study about the impact of colloidal rods density on the ordered structure. Through this study, we found that colloidal rods show an ordered structure under the complex interactions between the confined polymer system and colloidal rods.Through these studies, we know that a variety of ordered structures will be formed in confined complex polymer systems. This confined model is simple, easy and operable, so it provides a useful reference in preparation of a variety of soft matter systems ordered structures in experiment, even in the industrial applications.

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CLC: > Mathematical sciences and chemical > Physics > Condensed Matter Physics
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