An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
In-Situ Visualization of Polymer Blends Processing: Influence of Viscosity Ratio and Surfaces
Published
Author(s)
Kalman Migler, Erik K. Hobbie, F Qiao
Abstract
We study the effects of viscosity ratio, surfaces and shear on droplet morphology in immiscible polymer blends during extrusion. These in-line experiments are performed in an optical slit die situated at the exit of a twin screw extruder. At a very high ratio of droplet to matrix viscosity, large droplets are mildly deformed by the shear stress into diamond shaped structures. As the viscosity ratio is decreased, the droplets deform into elliptical and string-like structures and can further break-up into smaller droplets. The die surface can strongly affect morphology; we have observed that droplets at the surface can breakup under conditions where they are stable in the bulk.
Migler, K.
, Hobbie, E.
and Qiao, F.
(2008),
In-Situ Visualization of Polymer Blends Processing: Influence of Viscosity Ratio and Surfaces, Rubber Chemistry and Technology
(Accessed May 30, 2023)