Suppression of Initial Solvent-Driven Non-Equilibrium Effect on Polymer Nanocomposites with Physically Adsorbed Bimodal Polymers
발표자
조성민 (서울대학교)
연구책임자
김소연 (서울대학교)
초록
내용
In polymer nanocomposites (PNCs), polymers are adsorbed on the surface of nanoparticles, and adsorbed polymers contribute to determining the physical properties of PNCs. Many studies have first changed the intrinsic parameters such as size/shape/chemistry of particles/polymer to control adsorbed polymer. However, recent studies have shown that the final states of PNCs have path dependency induced by the non-equilibrium state of adsorbed polymers.
In this work, we investigate how the initial solvent-driven non-equilibrium effect on PNC changes when the conformation of adsorbed polymers is intentionally modified. To tune the chain conformation, we employ PNCs with a bimodal molecular weight distribution, in which unique chain conformations are formed via competitive adsorption between long and short chains. We found that the non-equilibrium effect in PNCs was suppressed in bimodal PNCs. This study will offer an insight into strategies for tuning the properties of PNCs.