Abstract
We present the synthesis and structural characterization of new nanocomposites made of linear tetramers of spherical magnetic nanoparticles of maghemite (γ-Fe2O3), grafted by tethered polystyrene (PS) chains with an intermediate grafting density (∼0.15 chains/nm2), dispersed in a PS matrix. First, we studied by combination of SAXS and TEM the dispersion state of the grafted objects within the matrix for various ratio R of the mass of the grafted chains N to the mass of free chains P ranging from R = N/P = 0.09 to R = 2.83. For R 1, the objects are also well dispersed although there are some remaining aggregates, arising probably from the fact that we have used matrix’ chains below the entanglement mass to r...
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