Fullerenes, Nanotubes and Carbon Nanostructures: nanocarbons-induced hardening of Ultrathin polysiloxane block copolymer films

Ultrathin films of polysiloxane block copolymers and their composites with a C60 modifying additive were studied by atomic force microscopy. Nanometre scale surface patterns independent of the additive concentration were revealed in the surface profiles of the films. These patterns were attributed t...

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Bibliographic Details
Published in:Cellular polymers 2012-09, Vol.31 (5), p.269
Main Authors: Ankudinov, A.V, Nyapshaev, I.A, Voznyakovskii, A.P
Format: Article
Language:English
Subjects:
Block copolymers
Carbon fibers
Chemical properties
Composition
Production processes
Siloxanes
Online Access:Get full text
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Summary:Ultrathin films of polysiloxane block copolymers and their composites with a C60 modifying additive were studied by atomic force microscopy. Nanometre scale surface patterns independent of the additive concentration were revealed in the surface profiles of the films. These patterns were attributed to the spatial distribution of rigid block domains at the block copolymer surface. Reliable quantitative data on mechanical properties of the films were obtained in indentation tests with specially fabricated spherical probes with a calibrated submicrometre radius of curvature. It was found that the addition of C60 in an amount on the order of 0.01% significantly improves the elasticity of the block copolymer surface layers At this concentration, several fullerene molecules can be introduced into each nanodomain of rigid blocks. 27 refs.
ISSN:0262-4893
1478-2421