| 초록 |
We firstly discuss the self-assembly behaviors of supramolecules formed by P4VP and THBA, via hydrogen bonding interactions. Different from other commonly studied small molecules, THBA bears three particularly long hydrophobic tails and tends to form stable crystals by itself, which gives rise to unusual phase behaviors and structures. We found that the crystallization of THBA can induce the dissociation and macrophase separation between P4VP and THBA. Second, we demonstrate that the supramolecular assembly is an efficient approach to control the microdomain orientation, either parallel or perpendicular to the surface, in block copolymer thin films. We investigated the effect of solvent annealing on the microdomain orientation in supramolecular thin films formed by PS-b-P4VP with hydrogen-bonded PDP. We show that the arrangement of bound small molecules is the key for controlling the orientation of block copolymer microdomains in thin film. |
