Polimery 2008, No 11/12, 888
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 17.7nm, respectively). Significant improvement - almost 60% increase in tensile strength, relative elongation at break reaching 700% - was observed in case of a high molecular weight (Mw) 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.
Key words: thermoplastic elastomers, nanocomposites, microgels grafted with polymers, rheological properties, mechanical properties
L. Jakuczek, J. S. Gutmann, Ch. Herrmann, D. Żuchowska
Modification of styrene-isoprene-styrene triblock copolymer with a core-shell filler (in English)