Macrocycles 27 - Cyclic Aliphatic Polyesters of Isosorbide
- Numerous polycondensations of isosorbide and suberoyl chloride or other aliphatic dicarboxylic acid dichlorides were performed with pyridine as a catalyst and HCl acceptor. The reaction conditions were varied to optimize both the molecular weight and the fraction of cyclic oligo- and polyesters. Furthermore, we attempted to obtain the cyclic monomer by catalyzed back-biting degradation of the molten cyclic polyesters above 220 °C in vacuo. The polyesters were characterized by viscosity and size exclusion chromatographic measurements as well as matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. In selected cases, mixtures of linear and cyclic polyesters were treated with a hot solution of partially methylated ß-cyclodextrin in methanol. This treatment allowed for a selective extraction of the linear chains up to approximately 5000 Da.
Autor*innen: | H. Kricheldorf, S. Chatti, G. Schwarz, Ralph-Peter Krüger |
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Dokumenttyp: | Zeitschriftenartikel |
Veröffentlichungsform: | Verlagsliteratur |
Sprache: | Englisch |
Titel des übergeordneten Werkes (Englisch): | Journal of polymer science A, polymer chemistry |
Jahr der Erstveröffentlichung: | 2003 |
Verlag: | Wiley |
Verlagsort: | Hoboken, NJ |
Jahrgang/Band: | 41 |
Ausgabe/Heft: | 21 |
Erste Seite: | 3414 |
Letzte Seite: | 3424 |
Freie Schlagwörter: | Cyclization; Isosorbide; MALDI; Polycondensation; Polyesters |
DOI: | 10.1002/pola.10933 |
ISSN: | 0360-6376 |
ISSN: | 0887-624X |
Verfügbarkeit des Dokuments: | Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access") |
Bibliotheksstandort: | Sonderstandort: Publica-Schrank |
Bibliotheksstandort: | ZJ 18A |
Datum der Freischaltung: | 19.02.2016 |
Referierte Publikation: | Ja |
Datum der Eintragung als referierte Publikation: | 06.02.2006 |