Technical note: The yield stress—An engineering reality

descriptionPublicationkeyboard_double_arrow_right Article 01 May 1989 English Publisher:Society of RheologyJournal:Journal of Rheology, volume 33, pages 671-679 (issn: 0148-6055, eissn: 1520-8516,

Authors: James P. Hartnett; Robert Y. Z. Hu;

doi: 10.1122/1.550006

Technical note: The yield stress—An engineering reality

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Abstract

A simple experiment using the falling ball technique was used to demonstrate unambiguously that a 2500 wppm aqueous Carbopol 960 solution has a yield stress. A series of photographs taken over a period of several months revealed that a nylon ball with a density of 1.156 g/cm3 showed no measurable movement when placed well within a Carbopol solution having a density of 1.008 g/cm3.

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University of Illinois at Chicago
United States

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