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Paste (rheology)



For other meanings of paste see Paste (disambiguation)


Additional recommended knowledge

In physics, a paste is a substance that behaves as a solid until a sufficiently large load or stress is applied, at which point it flows like a fluid. In rheological terms, a paste is an example of a Bingham plastic fluid.

Pastes typically consist of a suspension of granular material in a background fluid. The individual grains are jammed together like sand on a beach, forming a disordered, glassy or amorphous structure, and giving pastes their solid-like character. It is this "jamming together" that gives pastes some of their most unusual properties; this causes paste to demonstrate properties of fragile matter.

In pharmacology, paste is basic pharmaceutical form. It consists of fatty base (e.g., petroleum jelly) and at least 25% solid substance (e.g., zinc oxide).

Examples include starch pastes, toothpaste, mustard, and putty.

 
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Paste_(rheology)". A list of authors is available in Wikipedia.
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