title: Flory theorem for structurally asymmetric mixtures.
abstract: The generalization of the Flory theorem for structurally asymmetric mixtures was derived and tested by direct visualization of conformational transformations of brushlike macromolecules embedded in a melt of linear chains. Swelling of a brush molecule was shown to be controlled not only by the degree of polymerization (DP) of the surrounding linear chains, N(B), but also by the DP of the brush's side chains, N, which determines the structural asymmetry of the mixed species. The boundaries of the swelling region were established by scaling analysis as N(2) < N (B) < N (A)/N, where N (A) is the degree of polymerization of the brush backbone. Experiment and theory demonstrated good agreement.
authors.affiliation: Department of Chemistry, University of North Carolina at Chapel Hill, North Carolina 27599-3290, USA.
authors.forename: Frank C
authors.initials: FC
authors.lastname: Sun
authors.forename: Andrey V
authors.initials: AV
authors.lastname: Dobrynin
authors.forename: David
authors.initials: D
authors.lastname: Shirvanyants
authors.forename: Hyung-Il
authors.initials: HI
authors.lastname: Lee
authors.forename: Krzysztof
authors.initials: K
authors.lastname: Matyjaszewski
authors.forename: Gregory J
authors.initials: GJ
authors.lastname: Rubinstein
authors.forename: Michael
authors.initials: M
authors.lastname: Rubinstein
authors.forename: Sergei S
authors.initials: SS
authors.lastname: Sheiko
mesh_terms: D007700:Kinetics; D046911:Macromolecular Substances / Q000737:chemistry*; D008956:Models, Chemical; D008968:Molecular Conformation; D011108:Polymers / Q000737:chemistry*; D013816:Thermodynamics
chemical_list: D046911:Macromolecular Substances; D011108:Polymers