Solubility parameters
[Sperling-67]
- The value of a solubility parameter
depends on the chemical structure
of the chemical in question.
is the energy of vaporization
to a gas at zero pressure (i.e., infinite separation of the molecules)
[Sperling-66]
is molar volume
The
Flory-Huggins Parameter
relates to the difference of solubility parameters
- Calculations which use solubility parameters seem to always involve
the calculation of a difference between the solubility parameters of
two chemicals,
, and the smaller
the difference, the more likely one chemical will dissolve in the other.
is the
Flory Huggins Parameter.
Enthalpy Change of Mixing
Boltzmann constant and
Temperature.
is the number of polymer molecules.
- Sperling gives an example of a theoretical calculation for the
solubility parameter for polystyrene [Sperling-71]
- the units of a solubility parameter are unusual:
(1/2)
cal
-----
(3/2>
cm
Last Update- June 30, 1995- wld