Using POSS-C60 giant molecules as a novel compatibilizer for PS/PMMA polymer blends

Herein, we report a novel strategy to use Janus polyhedral oligomeric silsesquioxane (POSS)-[60] fullerene (C-60) (JPC) giant molecules as compatibilizer for immiscible polystyrene (PS)/polymethyl methacrylate (PMMA) blends. It was found that the domain sizes of the dispersed PMMA phase decrease in PS matrix, and tensile strength and elongation of PS/PMMA blends were largely enhanced by adding a small amount of JPC. More importantly, both interfacial tension analyses and elemental Si distribution in the blends suggest a possible location of the JPC at the PS/PMMA interfaces. Our studies provide not only a new idea for the compatibilization of polymer blends, but also for precisely controlling the positions of nanoparticles in a polymer matrix, which is also of great importance for the preparation of polymer nanocomposites with high-performance and excellent functionality.