title: Relaxation dynamics of langmuir polymer films: a power-law analysis.
abstract: We report an experimental study on the mechanical relaxation of Langmuir films of a flexible polymer: polyvinylacetate, a good example of a two-dimensional polymeric system at good-solvent conditions. This study allows us to explore the dependence of the relaxation times and the surface viscosity on the concentration. In the semidilute regime, both dynamical properties follow well-defined power laws, which are in quantitative agreement with 2D reptation.
authors.affiliation: Departamento de Química Física I, Facultad de Química, Universidad Complutense, Ciudad Universitaria s/n, E28040 Madrid, Spain. monroy@quim.ucm.es
authors.forename: Francisco
authors.initials: F
authors.lastname: Monroy
authors.forename: Hani M
authors.initials: HM
authors.lastname: Hilles
authors.forename: Francisco
authors.initials: F
authors.lastname: Ortega
authors.forename: Ramón G
authors.initials: RG
authors.lastname: Rubio
mesh_terms: D001704:Biopolymers / Q000737:chemistry*; D007700:Kinetics; D008956:Models, Chemical; D011108:Polymers / Q000737:chemistry*; D013816:Thermodynamics
chemical_list: D001704:Biopolymers; D011108:Polymers