| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 가을 (10/13 ~ 10/14, 제주 ICC) |
| 권호 | 30권 2호 |
| 발표분야 | 자기조립형 기능성재료 |
| 제목 | Spatio-Temporal Inhomogeneity and Emergence of Hierarchical Structures in Polymeric Systems |
| 초록 | Hierarchical structure exists ubiquitously in nature and is a consequence of the competition processes among a wide variety of dynamic phenomena which take place over very large time scales at different length scales. It has been known that materials with such a structural hierarchy ranging from nanometer to micrometer exhibit exceptional mechanical properties [1]. For polymer materials, hierarchical structures in the nanometer scales have been tailored by coupling microphase separation to self-assembling driven by hydrogen bonding [2]. Here, we will demonstrate that by coupling photochemical reactions to phase separation of polymer blends and by manipulating the spatio-temporal inhomogeneity of the reaction with ultraviolet light, a variety of hierarchical structures such as “lamellar in lamellar” [3], “droplet-in-droplet”, “droplet-in-spinodal”, “spinodal-in-spinodal” [4] as well as spatially graded spinodal structures [5] can be obtained in the micrometer scales. The time-evolution of phase separation at different hierarchies of the morphology will be reported and the mechanism for the emergence of these hierarchical structures will be discussed. References. 1) J. Aizenberg, J. C. Weaver, M.S. Thanawala, V.C. Sundar, D.E. Morse, P. Fratzl Science 309, 275 (2005). 2) J. Ruokolainen, R. Makinen, M. Torkkeli, T. Makela, R. Serimaa, G. ten Brinke, O. Ikkala Science 280, 557 (1998). 3) Q. Tran-Cong-Miyata, S. Nishigami, S. Yoshida, T. Ito, K. Ejiri, T. Norisuye in “Nonlinear Dynamics in Polymeric Systems”, ACS Symposium Series No. 869, Chapter 22, (2004). 4) H. Nakanishi, M. Satoh, T. Norisuye, Q. Tran-Cong-Miyata Macromolecules 37, 8495 (2004). 5) H. Nakanishi, N. Namikawa, T. Norisuye, Q. Tran-Cong-Miyata To be published. |
| 저자 | Qui Tran-Cong-Miyata |
| 소속 | Department of Polymer Science and Engineering |
| 키워드 | |
