Submitted to: Chemical Engineering Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 11/21/2004
Publication Date: 5/1/2005
Citation: Barone, J.R. 2005. Evaluation of polymer rheology from drop spreading experiments. Chemical Engineering Science. 60(1):2579-2584.
Interpretive Summary: The paper describes the kinetics of spreading of large, high viscosity fluid drops. This simple type of experiment can be used to assess how well a large, high viscosity fluid would cover a surface while flowing under the force of gravity. Furthermore, basic rheological information such as zero-shear viscosity can be calculated from the spreading experiments without the use of complicated rheological equipment.
Technical Abstract: In this paper, spreading experiments on "heavy" polymer drops are performed. "Heavy" refers to large polymer drops, i.e., the radius of the drop, R, is much larger than the capillary length, k^-1, so that the spreading is dictated by gravity. The zero-shear viscosity can be found from measurements of the time-dependent drop radius or vice versa. Viscosity values found from spreading experiments compare well with the viscosity values found from dynamic rheological experiments.