The glass transition of charged polymer colloids

Publisher Website
Google Scholar
Abstract
Dynamic and static light scattering is applied to concentrated suspensions of a new species of charged colloidal suspensions with a low refractive index. The polymer colloids which were obtained by polymerizing perfluorobutylacrylate could be index matched in a water/glycerol mixture. At volume fractions Φ greater than 0.22 a glass transition can be observed, which is manifested by the nondecaying components of the intermediate scattering functions. The intermediate scattering functions for a supercooled liquid sample and the predictions of the mode-coupling theory for the β relaxation are compared over a large Q range. By using an exponent parameter λ=0.76 a good agreement between theory and experiment can be obtained.