Rheological Properties of Bare and Grafted Nanoparticle in Crosslinked Polymer Networks

In this study, we aim to explore the dynamics of polymer nanocomposite networks in crosslinked states through linear rheology experiments. Particle size, loading and crosslinking degrees will be varied in poly(methyl methacrylate) (PMMA) network systems to understand the topological effects of chains and particles on rheological responses of networks. Dispersion and rheological behavior of PMMA-grafted particles in poly(methyl acrylate) (PMA) composite networks will be presented. Interfacial mixing of low and high glass-transition temperature polymers determines how these networks deform. The model system enables us to investigate how bare and polymer-grafted particle diffuse into entangled and unentangled crosslinking networks to further understand their mechanical properties.