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This table highlights polar/dispersion and acid—base breakouts of surface free energy, as well as Hansen Solubility Parameters and radius of interaction, for a variety of polymers. For all columns except polymer name, CAS #, and total Hansen Solubility Parameter (δ) the first row of data for each material is the average of surveyed values; the second row shows the standard deviation, with the number of data points (n) in parentheses. For n = 1, no standard deviation figure is shown. Click on any column's footnote for details. Click on any polymer name for original research results. An analogous table, which includes contact angle data, can be seen here. Comments on methodology and the like can be found here.

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Surface Free Energy Components by Polar/Dispersion and Acid—Base Analyses; and Hansen Solubility Parameters for Various Polymers

(a) Atactic PP CAS #9003-08-0; isotactic PP CAS #25085-53-4

(b) Aluminum foil, while obviously not a polymer, is included due to its widespread use in package converting and other industries.

⁽¹⁾ Names which are most widely used to describe the material or family of materials (e.g., polyurethanes and epoxies) at hand are preferred here. Commonly used acronyms and synonyms are also shown.

⁽²⁾ CAS (Chemical Abstract Series) numbers are shown where available. In a number of instances, more than one CAS number is assigned to a given polymer — in some cases the details and nuances of these divergences are not at all clear. We have tried to reference the CAS number which appears to have the widest use with reference to the solid state properties of the given polymer.

⁽³⁾ γ_s: Total surface free energy in mJ/m² (equivalent to dynes/cm), as reported in polar/dispersion analyses.

⁽⁴⁾ γ_s^d: Dispersion component of surface free energy in mJ/m² (equivalent to dynes/cm), as reported in polar/dispersion analyses.

⁽⁵⁾ γ_s^p: Polar component of surface free energy in mJ/m² (equivalent to dynes/cm), as reported in polar/dispersion analyses.

⁽⁶⁾ γ_s: Total surface free energy in mJ/m² (equivalent to dynes/cm), as reported in acid—base analyses.

⁽⁷⁾ γ_s^LW: Lipschitz—van der Waals (non-polar) component of surface free energy in mJ/m² (equivalent to dynes/cm), as reported in acid—base analyses.

⁽⁸⁾ γ_s^AB: Lewis acid—base interaction component of surface free energy in mJ/m² (equivalent to dynes/cm), as reported in acid—base analyses.

⁽⁹⁾ γ_s^-: Base polarity (electron-donor) component of surface free energy in mJ/m² (equivalent to dynes/cm), as reported in acid—base analyses.

⁽¹⁰⁾ γ_s⁺: Acid polarity (electron-acceptor) component of surface free energy in mJ/m² (equivalent to dynes/cm), as reported in acid—base analyses.

⁽¹¹⁾ δ: Total Hansen solubility parameter (square root of the sum of squares of the average values for dispersion, polar, and hydrogen bonding components), in MPa^1/2 (equivalent to joules/cubic centimeter; 2.0455 x (cal/cc)^1/2) @ 20-25^oC (293.15-298.15 K). All data from Hansen Solubility Parameters: A User's Handbook, 2nd Ed., C.M. Hansen, CRC Press, Boca Raton, FL, 2007.

⁽¹²⁾ δ_D: Hansen dispersion solubility parameter, in MPa^1/2 (equivalent to joules/cubic centimeter; 2.0455 x (cal/cc)^1/2) @ 20-25^oC (293.15-298.15 K). All data from Hansen Solubility Parameters: A User's Handbook, 2nd Ed., C.M. Hansen, CRC Press, Boca Raton, FL, 2007.

⁽¹³⁾ δ_P: Hansen polar solubility parameter, in MPa^1/2 (equivalent to joules/cubic centimeter; 2.0455 x (cal/cc)^1/2) @ 20-25^oC (293.15-298.15 K). All data from Hansen Solubility Parameters: A User's Handbook, 2nd Ed., C.M. Hansen, CRC Press, Boca Raton, FL, 2007.

⁽¹⁴⁾ δ_H: Hansen hydrogen bonding solubility parameter, in MPa^1/2 (equivalent to joules/cubic centimeter; 2.0455 x (cal/cc)^1/2) @ 20-25^oC (293.15-298.15 K). All data from Hansen Solubility Parameters: A User's Handbook, 2nd Ed., C.M. Hansen, CRC Press, Boca Raton, FL, 2007.

⁽¹⁵⁾ R_o: Interaction radius. All data from Hansen Solubility Parameters: A User's Handbook, 2nd Ed., C.M. Hansen, CRC Press, Boca Raton, FL, 2007.