Dresden 2006 – wissenschaftliches Programm
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CPP: Chemische Physik und Polymerphysik
CPP 11: POSTER Disperse Polymer Systems
CPP 11.45: Poster
Dienstag, 28. März 2006, 17:00–19:00, P3
Thermoplastic SBS nanocomposites based on brush coated silica microgels — •Leszek Jakuczek1,2 and Jochen Gutmann2,3 — 1Department of Polymer Engineering and Technology, Wroclaw University of Technology, Wybrzeze Wyspianskiego 27, 50-386 Wroclaw, Poland — 2Max Planck Institute for Polymer Research, Ackermannweg 11, D-55128 Mainz — 3Institute for Physical Chemistry, Johannes Gutenberg University, Welderweg 11, D-55099 Mainz
Physical modification of block copolymers enables the preparation of new types of materials exhibiting significantly improved mechanical and rheological properties. Especially well-defined nanofillers, with properties tailored at molecular level, are believed to be effective reinforcing agents, capable of meeting the expectations in new areas of application. One route leading to such nanocomposites is synthesis and incorporation of surface modified nanoparticles, like e.g. ultrafine polymer-grafted silica beads synthesized in emulsion. After surface modification via a grafting from ATRP synthesis, the resulting core-shell composites can be used in selective reinforcement of a chosen phase. Linear styrene-b-butadiene-b-styrene thermoplastic elastomer was modified with polystyrene-grafted organosilicon micro-gel particles. The state of filler dispersion and degree of grafting, morphology of the resulting nanocomposites, as well as their mechanical, rheological and thermal properties are examined using SEM, SAXS, GPC, DSC and dynamic thermomechanical analysis in order to provide information on interactions between filler and the modified matrix.