Nanorheology of Adsorbed Diblock Copolymer Layers - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal de Physique II Année : 1997

Nanorheology of Adsorbed Diblock Copolymer Layers

Eric Pelletier
  • Fonction : Auteur
Gérald Belder
  • Fonction : Auteur
Georges Hadziioannou
Andrei Subbotin
  • Fonction : Auteur

Résumé

We investigate the mechanical properties of ultra-thin layers of polystyrene/poly (2-vinylpyridine) (PS/P2VP) block copolymers by means of a Surface Forces Apparatus adapted to operate as a rheometer at the molecular level. Two systems are studied: “brush/wall" and “brush/brush". A comparison of the normal force curves shows that when brushes are compressed against each other, they contract rather than interpenetrate. Nanorheological experiments have been carried out on both systems but reliable measurements have been obtained only on the brush/wall system. The complex shear modulus, characterizing the confined medium, has been measured as a function of separation. Its distance dependence is compared with a scaling model describing the linear shear behaviour of a brush confined by a neutral surface.

Domaines

Articles anciens
Fichier principal
Vignette du fichier
ajp-jp2v7p271.pdf (741.19 Ko) Télécharger le fichier
Origine Accord explicite pour ce dépôt

Dates et versions

jpa-00248442 , version 1 (04-02-2008)

Identifiants

Citer

Eric Pelletier, Gérald Belder, Georges Hadziioannou, Andrei Subbotin. Nanorheology of Adsorbed Diblock Copolymer Layers. Journal de Physique II, 1997, 7 (2), pp.271-283. ⟨10.1051/jp2:1997124⟩. ⟨jpa-00248442⟩

Collections

AJP
17 Consultations
43 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More