Scaling theory is applied to derive expressions describing the influence of polymolecularity on the second virial coefficient, A , , as obtained from osmotic pressure and light scattering measurements. Numerical values of polymolecularity correction factors are calculated for Schulz-Zimm and logarit
Influence of prediction method of the second virial coefficient on inverse gas chromatographic parameters
β Scribed by Adam Voelkel; Jacek Fall
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 392 KB
- Volume
- 721
- Category
- Article
- ISSN
- 1873-3778
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## Abstract It is shown that the recently developed scaling theory for the second virial coefficient, __A__~2~, of dilute solutions of polymers with nonβuniform molecular weight distributions in a good solvent is able to explain in principle all seemingly contradictory observations reported in the
Pair interaction parameters like the second virial coefficient A z or the Flory-Huggins parameter Z are influenced by inter-and intramolecular contacts. The paper discusses a model in which A 2 linearly depends on M -~" 0.5), where a is the exponent in the Mark-Houwink relation. From this dependence
## Abstract A simple modification of the Pitzer relation to calculate second virial coefficients of polar compounds is proposed. The proposed modification is based on the use of a new parameter, Ξ², which embodies both the contributions of acentricity and polarity to second virial coefficient values