Thermomechanical Properties and Glass Dynamics of Polymer-Tethered Colloidal Particles and Films.

ABSTRACT: Polymer-tethered colloidal particles (aka "particle brush materials") have attracted interest as a platform for innovative material technologies and as a model system to elucidate glass formation in complex structured media. In this contribution, Brillouin light scattering is used to sequentially evaluate the role of brush architecture on the dynamical properties of brush particles in both the individual and assembled (film) state. In the former state, the analysis reveals that brush-brush interactions as well as global chain relaxation sensitively depend on grafting density; i.e., more polymer-like behavior is observed in sparse brush systems. This is interpreted to be a consequence of more extensive chain entanglement. In contrast, the local relaxation of films does not depend on graftin

SUBMITTER: Cang Y 

PROVIDER: S-EPMC5940324 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature