Hansen parameters

Three dimensional presentations are cumbersome and it is more convenient to transform the Hansen parameters into fractional parameters as defined by [14]... 

Due to the uncertainty in the way Hansen parameters are estimated, different values have been proposed for polymers, as shown in Table 16.3. The way the Hansen method is used for solubilty calculations is given in Section 16.3.3.1. 

When plotted in three dimensions, the Hansen parameters provide an approximately spherical volume of solubility for each polymer in Sj, Sp, 6h space. The scale on the dispersion axis is usually doubled to improve the spherical nature of this volume. The distance of the coordinates (6j, 6p, 61) of any solvent i from the center point (6, 5, S ) of the solubility sphere of polymer j is... 

Problem 3.22 Using Hansen parameters (Tables 3.5 and 3.6) determine if polystyrene is expected to dissolve in a solvent mixture of 60/40 v/v methyl ethyl ketone/n-hexane. 

The Hansen parameters are combined on a 60/40 volume fraction basis ... 

Hansen Parameters and Interaction Radius of some Polymers and... 

In an attempt to improve on the Hildebrand parameter and take into account the range of intermolecular interactions present in the majority of real fluids, there have been a number of multi-contribution derivations of the Hildebrand parameter (4). Probably the best known of these are the Hansen parameters where the Hildebrand parameter is broken down into three intermolecular contributions - dispersion forces, polar forces and hydrogen bonding forces ... 

Figure 2. Polarity-dispersion Hansen parameter map (Reproduced with permission from reference 1. Copyright 2002 Elsevier.)...

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