| 초록 |
The structures and dynamics of Interfacial polymers (IPs) near the particle surface are often distinguished from those of bulk polymer, which can contribute to the improved property of polymer nanocomposites (PNCs). Because of the slow dynamics of IPs, they are prone to be trapped in nonequilibrium during processing steps. A previous sutdy reported that the IPs formed by physical adsorption can exhibit different structures and dynamics of PNCs depending on the casting solvent even after a removal of casting solvent. In this work, we study initial solvent-driven nonequilibrium of the chemically grafted PNCs with varying grafting density. With low grafting density, the nonequilibrium effect is qualitatively similar to the case of physical adsorption. As grafting density is moderately increased, the difference in particle microstructures and rheological properties of PNC depending on the initial solvent is significantly reduced, implying a suppression of nonequilibrium effect. |
