Talk:Hansen solubility parameter

Which solubility parameter

I typed "solubility parameter" and expected to get Hildebrand (sq rt of cohesive energy density), which is the most basic definition. There does not seem to be any mention of Hildebrand solubility parameter, except in Flory Huggins theory, where it is not defined. Am I missing something, or does this need attention? I could do a quick definition and table. It would require re-organising the links so that "solubility parameter" went there, with a link from there to Hansen, or some other arrangement. I am new to this editing process, so advice is welcomed Stainless316 16:17, 16 November 2007 (UTC)

Hey, Stainless316 (BTW, I love the username), I understand your concern. Hansen Parameters are a refinement on Hildebrand Parameters and I think they are the best parameters to use, provided that you have access to a computer. Actually, there are a boatload of solubility parameter systems out there, so perhaps it would serve the NPOV to have a disambiguation page that would allow the navigation to the available solubility parameters pages. I'll do a little studying and if nobody objects, I'll make a few changes. Also, think solubility parameters should be added to chemical information if available. It will take me some time to get around to this, since I am new too and I have a bit to learn. I welcome advice on both how to do this and if it should be done. Lon of Oakdale (talk) 22:54, 14 May 2008 (UTC)

The "interaction radius" needs some kind of definition. Im a chemistry student, if I stumble upon it I'll add it here for verification, but I dont know much about it. 77.212.171.42 (talk) 21:08, 21 June 2010 (UTC)

Polar bonds?

Polar bonds in this context aren't intramolecular bonds, they are instead intermolecular bond (e.g.: dipole-dipole bonds). --Aushulz (talk) 22:47, 15 July 2010 (UTC)

The constant "4"

Under the heading 'Theoretical Context' is found the following statement:

"The factor of 4 in front of the Dispersion term in the calculation of Ra has been the subject of debate. There is some theoretical basis for the factor of four (see Ch 2 of Ref 1 and also.[4] However there are clearly systems (e.g. Bottino et al., "Solubility parameters of poly(vinylidene fluoride)" J. Polym. Sci. Part B: Polymer Physics 26(4), 785-79, 1988) where the regions of solubility are far more eccentric than predicted by the standard Hansen theory."

This is misleading. First of all, Bottino's paper does not say anything about Ra at all. Secondly, they forced dissolution process by heating up to 60 C. As Hansen states in his Hansen Solubility Parameters: A User's Handbook, Hansen parameters can change by varying temperature. Also, Bottino's work does not provide contradictory results against the 'standard Hansen theory.' They just failed to reproduce what was reported by Hansen. It appears irrelevant to put up that particular reference.

I would be very interested to see if there is any serious debate going on regarding the use of the factor '4'. However, if there is no further supporting information against the use of the factor, the above statement should be removed.

Any idea?

Interaction Parameter, R₀

Is there any reason the method for calculating the interaction parameter is not mentioned anywhere? It just seems to be introduced as some mythical concept rather than pointing out that it is determined through trial and error based on empirical evidence of what solvents dissolve the material.

Actually - notice it has been mentioned above. There is a description of how it is derived on page 184 of Hansen, Hansen Solubility Parameters A User's Handbook (2nd ed.)2007. — Preceding unsigned comment added by 82.10.236.187 (talk) 11:14, 15 July 2011 (UTC)

Inappropriate Original Research Tag on Page

The Hansen Solubility Parameters page has been improperly marked as original research. While the original work was done in Charles Hansen's PhD Thesis (who is still living), HSP is widely accepted in the paint and coatings industry as well as in the specialized cleaning solvent industry and other places. There is no reason to mark this as original research as it is a widely accepted model in the industries that need such data. Ckelloug (talk) 18:20, 10 October 2013 (UTC)