121st General Meeting of the KCS

Type Poster Presentation
Area Organic Chemistry
Room No. Event Hall
Time 4월 19일 (목요일) 11:00~12:30
Code ORGN.P-412
Subject Research on Self-Assembled Structure of Dendritic Linear Block Copolymer
Authors Jung Ho Joe, Woo-Dong Jang1,*
Chemistry, Yonsei University, Korea
1Department of Chemistry, Yonsei University, Korea
Abstract Well-ordered nanoscale structures can be produced from block copolymers (BCPs) having immiscible through self-assembly process. In this research, we studied self-assembled structure of BCP which is consisted of dendrimer and linear polyoxazoline (G-b-PiPrOx). Dendrimer block contains hydrophobic long alkyl chain and linear poly (2-isopropyl-2-oxazoline) block contain an amphiphilic oxazoline monomer. To study these structures, Atomic Force Microscopy (AFM) and Small-Wide Angle X-ray Scattering (SWAXS) was used. Self-assembled G-b-PiPrOx in bulk state built up different structure depending on temperature. In AFM thin film data, G-b-PiPrOx showed nanofiber shapes above its glass transition temperature (Tg). The molecular weight of each polymer block also affected the size of the self-assembled structure. By increasing molecular weight of each block, the diameter of nanofibers was increased. In SWAXS data, the d-spacing of self-assembled G-b-PiPrOx was affected by not only molecular weight but also molecular shape. The diameter of nanofiber was more influenced by the sized of dendrimer block, because of the high density of the dendrimer end group.
E-mail jungho519@yonsei.ac.kr