Abstract
Mechanical properties of composite materials based on triblock poly(styrene-b-isoprene--b-styrene) copolymers (SIS) and modified with two different grades of core-shell fillers (core -silsesquioxane microgel, shell - grafted polystyrene, particle diameters 15.7 and 17.7 nm, respectively). Significant improvement - almost 60 % increase in tensile strength, relative elongation at break reaching 700 % - was observed in case of a high molecular weight (M w ) copolymer at the maximal filler concentration of about 2 wt. % and longer chains of the polystyrene-shell. The rheological properties of nanocomposites differed with respect to the non-modified copolymer - softening of the material at higher temperatures was noticed.
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