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Phase equilibrium and diffusion of solvents in polybutadiene: A capillary-column inverse gas chromatography study
- Source :
- Journal of Polymer Science Part B: Polymer Physics; 15 May 2002, Vol. 40 Issue: 10 p1046-1055, 10p
- Publication Year :
- 2002
-
Abstract
- The capillary-column inverse gas chromatography method was used to measure the diffusion and partition coefficients of ethylbenzene, styrene, and acrylonitrile in polybutadiene (PBD) at infinite dilution of the solvents. Experiments were performed over a temperature range of 50125 °C. At temperatures well above the glass-transition temperature of PBD, the diffusivities were correlated using an Arrhenius expression. The Arrhenius parameters in turn were intercorrelated and shown to be a function of the occupied volume, thus providing a method for predicting the diffusion of other solvents in the same polymer. Further, the activation energy was predicted using the Duda-Vrentas free-volume approach. The activation energy thus obtained was compared with the activation energy of the Arrhenius approach. The weight-fraction activity coefficient data were compared to the predictions of the group contribution, lattice-fluid equation-of-state, and the UNIquac Functional-group Activity Coefficient (UNIFAC) free-volume models. © 2002 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 40: 10461055, 2002
Details
- Language :
- English
- ISSN :
- 08876266 and 10990488
- Volume :
- 40
- Issue :
- 10
- Database :
- Supplemental Index
- Journal :
- Journal of Polymer Science Part B: Polymer Physics
- Publication Type :
- Periodical
- Accession number :
- ejs2125426
- Full Text :
- https://doi.org/10.1002/polb.10156