Premium
Experimental measurement of diffusion in aqueous polyvinylpyrrolidone solutions
Author(s) -
Metaxiotou Zoe A.,
Nychas Stavros G.
Publication year - 1995
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690410408
Subject(s) - polyvinylpyrrolidone , thermal diffusivity , aqueous solution , diffusion , dynamic light scattering , thermodynamics , chemistry , taylor dispersion , light scattering , analytical chemistry (journal) , materials science , scattering , optics , chromatography , physics , polymer chemistry , nanotechnology , nanoparticle
Abstract Diffusivities of aqueous dilute and semidilute polyvinylpyrrolidone solutions M w = 50,500 and M w = 867,000 were measured at 25°C. The measurements were performed by Taylor's hydrodynamic stability method and the dynamic light scattering (DLS) method. Taylor's method was compared to DLS and evaluated as an experimental technique to determine the molecular diffusivity in polymer solutions. The agreement between the two methods was very good with Taylor's method proving to be a reliable, simple, and inexpensive technique that provided diffusivity data with a maximum error of 5%.