Eintrag weiter verarbeiten
A general model for the diffusion and swelling of polymers and its application to ultra-high molecular mass polyethylene
Gespeichert in:
| Zeitschriftentitel: | Proceedings of the Royal Society of London. Series A: Mathematical and Physical Sciences |
|---|---|
| In: | Proceedings of the Royal Society of London. Series A: Mathematical and Physical Sciences, 444, 1994, 1921, S. 267-285 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
The Royal Society
|
| Schlagwörter: |
| Zusammenfassung: | <jats:p> A numerical scheme is described that can predict the diffusion and swelling of solvents into a one-dimensional polymer slab. The work extends previous models of non-fickian diffusion and incorporates both generalized fickian diffusion and a concentration dependent viscoelastic response of the polymer. Depending on the relative magnitude of different parameters, both broad and sharp concentration profiles are predicted, together with linear or <jats:italic>t</jats:italic> <jats:sup>½</jats:sup> mass uptake kinetics. The model is found to successfully predict the experimentally determined mass uptake kinetics of ultra-high molecular mass polyethylene exposed to an organic solvent at low and high temperatures. Significant solvent loadings are observed with linear kinetics at low temperature and <jats:italic>t</jats:italic> <jats:sup>½</jats:sup> kinetics at higher temperatures. </jats:p> |
|---|---|
| Umfang: | 267-285 |
| ISSN: |
0962-8444
2053-9177 |
| DOI: | 10.1098/rspa.1994.0017 |