Architecture of brush-on-brush copolymers by photoinduced ATRP approach

The brush-on-brush copolymers (BB) were prepared by grafting from photoinduced ATRP of multifunctional polystyrene having N,N-diethyldithiocarbamate (DC) pendant groups with stearyl methacrylate (STM). It was found from angular dependence on dynamic light scattering (DLS) that the BB with large aspect ratio took a geometrical anisotropic conformation due to crowding of brush side chains. TEM photograph of BB also showed a rigid rod-like morphology.