Self‐Assembly and Critical Solubility Temperature of Supramolecular Polystyrene Bottle‐Brushes in Cyclohexane - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Macromolecules Année : 2015

Self‐Assembly and Critical Solubility Temperature of Supramolecular Polystyrene Bottle‐Brushes in Cyclohexane

Résumé

The formation of polystyrene (PS) supramolecular bottle-brushes by self-assembly in cyclohexane of hydrogen-bonding tris(urea) units decorated by PS chains was investigated using light and neutron scattering. Atom transfer radical polymerization (ATRP) was used to control the length of the PS side-chains and allowed the straightforward synthesis of the targeted tris(urea)s. It was shown that their extent of self-assembly strongly depended on the degree of polymerization and chemical nature of the polymer side chains, in contrast with what was previously observed with cyclic oligopeptides, another type of self-assembling units. With sufficiently short PS side-chains, anisotropic supramolecular bottle-brushes could be obtained. Their critical solubility temperature, Tc, was measured in cyclohexane, proving experimentally for the first time that densely grafted PS bottle-brushes exhibit a much lower Tc than linear PS or even star-shaped PS of similar molecular weight.
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hal-01696686 , version 1 (27-08-2020)

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Sylvain Catrouillet, Laurent Bouteiller, Erwan Nicol, Taco Nicolai, Sandrine Pensec, et al.. Self‐Assembly and Critical Solubility Temperature of Supramolecular Polystyrene Bottle‐Brushes in Cyclohexane. Macromolecules, 2015, 48 (5), pp.1364--1370. ⟨10.1021/ma5024022⟩. ⟨hal-01696686⟩
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