(Macromolecules) Amphiphilic Poly(Ethylene Oxide)-block-Poly(Butadiene-graft-Liquid Crystal) Copolymers: Synthesis and Self-Assembly in Water
writer：Yang, H.; Jia, L.; Zhu, C.; Di-Cicco, A.; Levy, D.; Albouy, P.-A.; Li, M.-H.; Keller, P.*
keywords：Self-Assembly
source：期刊
specific source：Macromolecules, 2010, 43, 10442-10451.
Issue time：2010年
What could be the self-assembly behaviour in aqueous
solution for an amphiphilic block copolymer with a very flexible hydrophobic
backbone possessing however a liquid crystalline (LC) order? To answer this
question, five amphiphilic block copolymers were prepared by grafting, via a
thiol-ene addition reaction, four different thiol functionnalized LC mesogens
or LC-like side groups on two commercially available
poly(ethylene oxide)-block-poly(butadiene)
(PEO-b-PB) polymers. These copolymers
form monodisperse nanospheres in dilute deionized water with the aid of
1,4-dioxane as co-solvent (dioxane-H2O system), while in THF-H2O
system, some give heterogeneous polydisperse micelles, and others form large hollow
concentric spherical vesicles (“Russian dolls” arrangement). Smectic stripes
inside the vesicles and the nanospheres are clearly visualized by cryo-TEM technique.
