.FCSys.Characteristics.'SO3-'.Ionomer

Information

Assumptions:

1. Constant specific volume (i.e., incompressible and without thermal expansion)

The specific volume (v = U.cc*m/(2.00*U.g)) is based on [Lin2006, p. A1327]. Note that this is approximately 1.912 M, which does not match the default density of 'H+'.Ionomer (0.95 M), but it simplifies the model by requiring only C₁₉HF₃₇O₅S^- (not C₁₉HF₃₇O₅S) for charge neutrality.

Additional notes:

• Most of the data for this species is for C₁₉HF₃₇O₅S rather than C₁₉HF₃₇O₅S^- (with the exception of specific mass).
• A form of C₁₉HF₃₇O₅S is C₇HF₁₃O₅S.(C₂F₄)₆, which is a typical configuration of Nafion sulfonate (after hydrolysis) [Mark1999, p. 234].
• Thermodynamic data for this material is not available from [McBride2002]. The default specific heat capacity (b_c = [4188*U.J*m/(U.kg*U.K)]) is based on [Shah2009, p. B472].
• According to [Avogadro], the furthest distance between two atoms of C₁₉HF₃₇O₅S is 2259.8 pm and is between fluorines. The radius of F is 147 pm (http://en.wikipedia.org/wiki/Fluorine).
• From [Avogadro], the molecular weight of C₁₉HF₃₇O₅S is 1044.214 g/mol. However, the "11" in Nafion 11x indicates a molecular weight of 1100 g/mol. According to http://en.wikipedia.org/wiki/Nafion, "the molecular weight of Nafion is uncertain due to differences in processing and solution morphology."

For more information, please see the Characteristic package.