Phase structure and properties of blends based on polystyrene and carbosilane dendrimers

Abstract

Blends based on polystyrene and first- and third-generation carbosilane dendrimers with dimethyl(2-phenylethyl)silyl)propyl terminal groups are studied. For the same chemical structure of the outer layer, a change in the radii of nanoparticles from 0.9 to 2.0 nm entails a sharp decline in the rate of their mass transfer to the polymer bulk. Dendrimers of the first and third generations are characterized by substantially different compatibilities with polystyrene. It is assumed that this effect is associated with an increase in the energy of interaction between dendrimers. When dendrimers of the first generation are introduced into polystyrene, the viscosity, glass-transition temperature, and storage modulus decrease, while the filling of polystyrene with dendrimers of the third generation insignificantly affects these characteristics of the polymer.