Transcription of Hansen Solubility Parameters: Introduction and Applications
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Hansen Solubility Parameters: Introduction and Applications
Hansen Solubility Param eters: I ntroduction and Applications Assoc. Prof. Daniel F. Schmidt Departm ent of P lastics Engineering Solubility How do we understand Solubility ? Like dissolves like . Polar vs. non-polar solvents Typically refers to the degree of charge separation in the solvent molecule The greater the strength and / or separation of charges, the more polar the solvent - Hexane Acetone O Water - H3C O. CH3 H3C + CH3 + +. H H. Less polar M ore polar Quantifying Behavior If we want to be quantitative, there are several approaches; two examples: Kauri-butanol (Kb) value (ASTM D1133).
Solubility Parameters (HSPs) HSPs mean we can represent each compound as a point in 3D “solubility space” Distance between HSP points in solubility space is defined as follows: With some work, it is also possible to define an interaction radius (R 0) and a reduced energy difference (RED = R a /R 0) RED > 1 Incompatible, RED < 1
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