Critical brush density for the transition between carpet-only and carpet/brush double-layered structures

The critical brush density, where transition from carpet-only structure to carpet/brush double-layered structure occurs, was estimated for a weakly ionic amphiphilic diblock copolymer, (diethylsilacyclobutane)34-b-(methacrylic acid)50, monolayer on water by an in situ X-ray reflectivity technique. T...

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Published in:Langmuir 2005-07, Vol.21 (15), p.6842-6845
Main Authors: MATSUOKA, Hideki, FURUYA, Yasuyuki, KAEWSAIHA, Ploysai, MOURI, Emiko, MATSUMOTO, Kozo
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Chemistry
Exact sciences and technology
General and physical chemistry
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container_issue 15
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creator MATSUOKA, Hideki
FURUYA, Yasuyuki
KAEWSAIHA, Ploysai
MOURI, Emiko
MATSUMOTO, Kozo
description The critical brush density, where transition from carpet-only structure to carpet/brush double-layered structure occurs, was estimated for a weakly ionic amphiphilic diblock copolymer, (diethylsilacyclobutane)34-b-(methacrylic acid)50, monolayer on water by an in situ X-ray reflectivity technique. The brush density in the monolayer was controlled from 0.11 to 0.60 brush chain/nm2 by changing surface pressure and mixing a poly(diethylsilacyclobutane) homopolymer separately synthesized. Only a carpet layer was formed at a low brush density condition, but a carpet and brush double layer was found for a higher brush density of more than 0.48/nm2. This brush density, which is fairly high, would be valuable for discussing the polyelectrolyte brush nanostructure.
doi_str_mv 10.1021/la047188a
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subjects Chemistry
Exact sciences and technology
General and physical chemistry
title Critical brush density for the transition between carpet-only and carpet/brush double-layered structures
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