1. Home page
  2. Search

Dynamics of amphiphilic diblock copolymers at the air-water interface

This item is provided by the institution :
National Hellenic Research Foundation (NHRF)   

Repository :
Helios - Repository of the National Hellenic Research Foundation (NHRF)  | repositories EKT   

see the original item page
in the repository's web site and access all digital files if the item*



Dynamics of amphiphilic diblock copolymers at the air-water interface
Πίσπας, Στέργιος
Tauer, Klaus
Sigel, Reinhard
Stocco, Antonio
Άρθρο σε επιστημονικό περιοδικό
2011-03-01
Two polyisoprene-polyethyleneoxide diblock copolymers with different block length ratios adsorbed to the water surface were investigated by multiple angle of incidence ellipsometry, evanescent wave light scattering, and surface tension experiments. In a semidilute interfacial regime, the transition from a two-dimensional to a "mushroom" regime, in which polymer chains form loops and tails in the subphase, was discussed. A diffusion mechanism parallel to the interface was probed by evanescent wave dynamic light scattering. At intermediate concentrations, the interfacial diffusion coefficient D(parallel to) scales with the surface concentration Gamma, as D(parallel to) similar to Gamma(0.77) in agreement with the scaling observed for polymer solutions in a semidilute regime. At relatively high concentrations a decreasing of D(parallel to) is discussed in terms of increasing friction due to interactions between polyisoprene chains.
SAN DIEGO
Φυσική και θεωρητική χημεία (EL)
Physical and theoretical chemistry (EN)
Air-water interface
Light scattering
Diffusion
Amphiphilic polymer
Ellipsometry
English
Academic Press
Journal of Colloid and Interface Science (formerly Known as Journal of Colloid Science)
https://rightsstatements.org/page/InC/1.0/?language=en
© 2010 Elsevier Inc. All rights reserved.
© 2010 Elsevier Inc. All rights reserved. (EN)
National Hellenic Research Foundation (NHRF)
Helios - Repository of the National Hellenic Research Foundation (NHRF)



*Institutions are responsible for keeping their URLs functional (digital file, item page in repository site)