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- Solubility and Self-Assembly of Amphiphilic Gradient and Block Copolymers in Supercritical CO2 doi link

Auteur(s): Ribaut Tiphaine, Oberdisse J., Annighofer Burkhard, Fournel Bruno, Sarrade Stéphane, Haller Heike, Lacroix-Desmazes Patrick

(Article) Publié: Journal Of Physical Chemistry B, vol. 115 p.836-843 (2011)


Ref HAL: hal-00630034_v1
DOI: 10.1021/jp108888x
WoS: 000286797700008
Exporter : BibTex | endNote
27 Citations
Résumé:

This work aims at demonstrating the interest of gradient copolymers in supercritical CO2 in comparison with block copolymers. Gradient copolymers exhibit a better solubility in supercritical CO2 than block copolymers, as attested by cloud point data. The self-assembly of gradient and block copolymers in dense CO2 has been characterized by Small-Angle Neutron Scattering (SANS) and it is shown that it is not fundamentally modified when changing from block copolymers to gradient copolymers. Therefore, gradient copolymers are advantageous thanks to their easier synthesis and their solubility at lower pressure while maintaining a good ability for self-organization in dense CO2.