Correlation of activation energies of gas diffusivity and local matrix mobility in polycarbonate/POSS nanocomposites
- According to basic phenomenological models describing the solution-diffusion based mechanism of penetrant diffusion in dense polymers, a connection between the diffusive transport of gas molecules in a polymeric matrix and the molecular mobility of that matrix on a certain length scale is, in principle, established for a long time. However, experimental data directly showing this correlation are rare. The investigation of a series of nanocomposites based on a polyhedral oligomeric silsesquioxane (POSS) and a polycarbonate matrix allows a systematic change of the molecular mobility on a local length scale (β-relaxation) and of the corresponding activation energy EA, both determined by broadband dielectric spectroscopy. Independently, activation energies of penetrant diffusion (ED) of these nanocomposites were determined for N2, O2, CO2, and CH4 and a clear linear correlation between the two activation energies was established for the first time.
Autor*innen: | Martin BöhningORCiD, Ning Hao, Andreas SchönhalsORCiD |
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Dokumenttyp: | Zeitschriftenartikel |
Veröffentlichungsform: | Verlagsliteratur |
Sprache: | Englisch |
Titel des übergeordneten Werkes (Englisch): | Journal of polymer science B, polymer physics |
Jahr der Erstveröffentlichung: | 2013 |
Verlag: | Wiley |
Verlagsort: | Hoboken, NJ |
Jahrgang/Band: | 51 |
Ausgabe/Heft: | 22 |
Erste Seite: | 1593 |
Letzte Seite: | 1597 |
Freie Schlagwörter: | Beta-relaxation; Broadband dielectric spectroscopy; Dielectric properties; Diffusion; Gas permeation; Molecular mobility; Nanocomposites; Polyhedral oligomeric silsesquioxane (POSS); Relaxation |
DOI: | 10.1002/polb.23381 |
URL: | http://onlinelibrary.wiley.com/doi/10.1002/polb.23381/full |
ISSN: | 0887-6266 |
ISSN: | 1099-0488 |
Verfügbarkeit des Dokuments: | Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access") |
Bibliotheksstandort: | Sonderstandort: Publica-Schrank |
Datum der Freischaltung: | 20.02.2016 |
Referierte Publikation: | Ja |
Datum der Eintragung als referierte Publikation: | 21.10.2013 |