Neutron Scattering Studies of Structure and Self-Assembly of Star-Shaped Polymers with Fullerene Centres in Solutions |
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| Authors: | Vasily Lebedev Lyudmila Vinogradova Gyula Török |
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| Institution: | 1. Petersburg Nuclear Physics Institute, 188300 Gatchina St.Petersburg distr., Russia;2. Institute of Macromolecular Compounds, S.Petersburg, Bolshoy pr.31, Russia;3. Research Institute for Solid State Physics and Optics, POB-49, Budapest, Hungary |
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| Abstract: | Protonated star-shaped polystyrenes with single and double fullerene C60 core and the hybrid stars with pairs of polar and non-polar arms (tertbuthylmetacrylate, polystyrene) have been studied in deuterated toluene (20 °C) by small-angle neutron scattering at low and moderate polymer concentrations (c1 ∼ 1 g/dl, c2 ∼ 3–6 g/dl) to evaluate the peculiarities of fullerene centre action on polymers self-assembly in solutions. As we found, the cores composed of two fullerenes, linked via Si(CH3)2-bridge, induce stars' anisotropic interactions and association into chain-like structures (correlation radius ∼400–600 nm). Meanwhile, the single-core stars of polystyrene and hybrids organize globular clusters (size ∼ 103 nm) those geometry do not change significantly by polymer content variation. |
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| Keywords: | neutron scattering star polymers structure |
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