123rd General Meeting of the KCS

Type Poster Presentation
Area Polymer Chemistry
Room No. Exhibition Hall 2
Time 4월 19일 (금요일) 11:00~12:30
Code POLY.P-29
Subject Transformation of Poly(4-vinylphenol)-b-Poly(vinyl alcohol) diblock copolymeric micelle in Mixed Solvent Systems
Authors Taehyoung Kim, Sang Youl Kim*
Department of Chemistry, Korea Advanced Institute of Science and Technology, Korea
Abstract Due to the different affinity of poly(4-vinylphenol) and poly(vinyl alcohol) with solvents, the diblock copolymer consisting of these two polymers can be self-assembled into a core-shell type particle. We synthesized poly(4-vinylphenol)-b-poly(vinyl alcohol) diblock copolymer and studied the core-shell structure in mixed solvent systems. The poly(4-vinylphenol) and the poly(vinyl alcohol) blocks were obtained by hydrolyzing their precursor, poly(4-acetoxystyrene) and poly(vinyl acetate), respectively. In water/DMSO mixed solvent condition, we confirmed the core-shell structure in which poly(4-vinylphenol) block acts as a core and poly(vinyl alcohol) block acts as a shell. In contrast, the core-shell particle with the inverted composition, poly(vinyl alcohol) core and poly(4-vinylphenol) shell, was formed in the THF/DMSO mixed solvent system. Interestingly under the condition of THF/DMSO mixed solvent system, we could observe other morphologies of core-shell nanoparticles besides spherical micelle. From the change of fluorescent emission shape and metal-polymer interaction in different solvents, the location of poly(4-vinylphenol) block can be identified.
E-mail thkim93@kaist.ac.kr