Morphological Transition of Coil-Rod-Coil Triblock Copolymer Blend with Homopolymer via Dissipative Particle Dynamics Simulation

• Main Authors: Wu, Ying-Ting, 吳穎婷
• Other Authors: Chang, Rong-Yu
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/89020400174728672598

碩士 === 國立清華大學 === 化學工程學系 === 99 === Dissipative particle dynamics simulation was performed on rich equilibrium phase structure by blending coil-rod-coil triblock copolymers and homopolymers, in which the influence of blending ratio as well as the chain length of rod block of coil-rod-coil triblock copolymers were studied systematically. We also investigated some statistic properties (e.g., End- to- End Distance, Radius of Gyration). The results show that bond bending force is not only a promising strategy to control the angle between the bonds, but also made a great impact on polymer morphology. When the rod volume fraction is large, the perfect lamellar structure is formed, which is increasingly used as templating materials. Furthermore, we also found remarkable self-assembled behavior such as dumbbell-like, T-like, perforated lamellar structures when the rod volume fraction is low. The ability to control the formation of specific patterns and structures is of growing interest and applicability. Finally, we believe that the rod volume fraction of coil-rod-coil triblock copolymer had a great effect on orderly structure of the self-assembly process of blending.