TY  - JOUR
AU  - Kim, Chang J.
AU  - Sondergeld, Katrin
AU  - Mazurowski, Markus
AU  - Gallei, Markus
AU  - Rehahn, Matthias
AU  - Spehr, Tinka
AU  - Frielinghaus, Henrich
AU  - Stühn, Bernd
TI  - Synthesis and characterization of polystyrene chains on the surface of silica nanoparticles: comparison of SANS, SAXS, and DLS results
JO  - Colloid & polymer science
VL  - 291
IS  - 9
SN  - 1435-1536
CY  - Berlin
PB  - Springer
M1  - FZJ-2015-00518
SP  - 2087 - 2099
PY  - 2013
AB  - An extensive characterization of well-defined polystyrene (PS)-grafted silica nanoparticles is reported. Bare SiO2 particles (diameter 50 nm) were functionalized with a suitable initiator for the surface-initiated anionic polymerization of styrene. Both grafted and free PS chains were characterized and compared by size-exclusion chromatography (SEC). PS-grafted particles were characterized by transmission electron microscopy (TEM), thermogravimetric analysis (TGA), small-angle x-ray scattering (SAXS), small-angle neutron scattering (SANS), and dynamic light scattering (DLS). The thickness of the grafted PS chains was obtained by SANS and DLS and scaled with M0.6w displaying similar behavior with free PS chains in the same solvent used, tetrahydrofuran (THF). Grafting densities obtained from SANS data and TGA were found to be small, and the thickness of the grafted PS chains determined by SANS was found to be similar to 2Rg of free PS chains in THF. Both results are consistent with a “coil-like” conformation of the grafted PS chains.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000323248000006
DO  - DOI:10.1007/s00396-013-2923-z
UR  - https://juser.fz-juelich.de/record/186443
ER  -