G. Baeza, A.-C. Genix, C. Degrandcourt, J. Gummel, A. Mujtaba, K. Saalwächter, T. Thurn-Albrecht, M. Couty, J. Oberdisse.
Studying Twin Samples Provides Evidence for a Unique Structure-
Determining Parameter in Simplifed Industrial Nanocomposites.
ACS Macro. Lett. 3, 448-452 (2014).
The structure of styrene-butadiene (SB) nanocomposites
filled with industrial silica has been analyzed using
electron microscopy and small-angle X-ray scattering. The grafting
density per unit silica surface ρD3 was varied by adding graftable SB
molecules. By comparing the filler structures at fixed ?D3 (so-called
“twins”), a surprising match of the microstructures was evidenced.
Mechanical measurements show that ρD3 also sets the modulus: it is
then possible to tune the terminal relaxation time of nanocomposites
via the chain length while leaving the modulus and