|
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 |
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