Talk:Thixotropy

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A really nice video of a demonstration of this effect... for the reference section... can be found here: http://www.youtube.com/watch?v=f2XQ97XHjVw

Dan Greenberg Massachusetts, USA

[edit] Shear thinning

Is this page redundant with shear thinning? —Ben FrantzDale 23:24, 4 May 2007 (UTC)

I agree. I added a merge request to the page. ---- BAxelrod 12:27, 25 October 2007 (UTC)

I disagree: Shear thinning is related to a time-independant property of the constituve relations between shear rate and shear stress, while thixotropy is a time-dependant property. —Preceding unsigned comment added by 132.169.12.58 (talk) 14:47, 30 October 2007 (UTC)

Ditto to 132.169.12.58, above - just reading the article heads seems to make the distinction clear. In fact, a quick Googling yields this UK 'Ask a Scientist' page explicitly warning against confusion of the two. —Preceding unsigned comment added by Robin Z (talk • contribs) 17:38, 15 November 2007 (UTC)

I just had a look at shear thinning, Dilatant, Thixotropy and Rheopecty, and I think all four stubs could stand to be merged for clarity, especially as the cites on them are a cat's cradle of references to each other, with no external published source. The statements about how the four behaviors differ from each other are at present just uncited assertions. Perhaps the stubs for shear thinning and Dilatant could be merged with Non-Newtonian fluid, and the stubs for Thixotropy and Rheopecty could be merged with Rheology? -- Del C (talk) 13:11, 22 February 2008 (UTC)

WRONG Industrially, the term "thixotropy" has nothing to do with time. The in my opinion silly use of this term in some or most of the academic literature as the hysteresis in viscosity is diametrically opposed to the industrial useage. Academics - at constant shear a change in viscosity with time - (change is often ~log(t)) Industrialists - Reduction in viscosity (shear thinning) as shear rate is increased (change is often ~log(µ)) While purists may have the idea that pseudoplasticity is synonomous with thixotropy in the industrial lexicon, they fail to understand that in both of the above cases the change is of necessity accompanied by a change in structure/orientation in the liquid which can not occur instantaneously. Hence in either case the is a relaxation time associated with the change. Also in both cases the change may or may not be reversible.

[edit] Toothpaste - cite?

"Toothpaste is thixotropic, which allows it to be squeezed out of the tube, yet retain a solid shape on the brush."

I thought toothpaste was a Bingham plastic? I certainly didn't think it became more liquid the longer it was squeezed. Does anyone have a source for this? Skittle 20:53, 2 December 2007 (UTC)

I am trying to conduct research on strength parameters of soil sample "undisturbed vs remoulded". I need literature regarding this topic but unable to find - please help me - Bhim Dahal , Kathmandu —Preceding unsigned comment added by 119.2.58.142 (talk) 08:29, 3 March 2008 (UTC)