화학공학소재연구정보센터
학회 한국고분자학회
학술대회 2020년 가을 (10/05 ~ 10/08, 부산컨벤션센터(BEXCO))
권호 45권 1호
발표분야 대학원생 구두발표 (영어발표, 발표15분)
제목 Viscosification of Nanoparticle Dispersion via Modulation of the Hydrogen Bonding Mode
초록 We report a terpolymer composed of a self-complementary hydrogen bonding unit and a solubilizing unit within a PMMA backbone by RAFT copolymerization. Using this polymer, we have devised a kinetic pathway to target the metastable nanoparticle state by inducing intramolecular collapse. By DLS analysis, we confirmed that uniformly dispersed nanoparticles were produced; and with temperature variation, we discovered that these nanoparticles were sensitive to heat and its thermal history. Temperature-dependent 1H-NMR analysis showed that the polymer nanoparticles held together by hydrogen bonding started to loosen above a certain temperature. By exploiting these properties of the polymer nanoparticle in solution, we demonstrate that by applying heat the dispersed nanoparticle in the non-polar solvent gradually releases individual chains and in turn change the macroscopic property of the polymer solution, providing an interesting possibility of controlling polymer solution viscosity.
저자 신이삭, 서명은
소속 한국과학기술원
키워드 nanoparticle; viscosity; hydrogen bonding; RAFT polymerization
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