at Google ScholarTitle data
Agarwal, Seema ; Brandukova-Szmikowski, Natalia E. ; Greiner, Andreas:
Reactivity of Sm(II) compounds as ring-opening polymerization initiators for lactones.
In: Macromolecular Rapid Communications.
Vol. 20
(1999)
Issue 5
.
- pp. 274-278.
ISSN 1521-3927
DOI: https://doi.org/10.1002/(SICI)1521-3927(19990501)20:5<274::AID-MARC274>3.0.CO;2-J
Abstract in another language
Successful room temperature ring-opening polymerization (ROP) of ε-caprolactone and δ-valerolactone has been carried out using SmX2 (X = I, Br, and cyclopentadienyl (Cp)) catalysts. SmI2 in the presence of metallic Sm was found to have enhanced reactivity as room temperature ROP initiator for lactones as compared to pure SmI2. SmBr2 and SmCp2 showed increased reactivity compared with the Sm/SmI2 system due to their higher reductive power. The catalyst concentration and time of polymerization showed a marked effect on number-average molecular weight (Mn). There was a decrease in Mn on increasing reaction time and decreasing catalyst concentration. The initiation mechanism is discussed based on end group analysis of low molecular weight polymers.
Further data
| Item Type: | Article in a journal |
|---|---|
| Refereed: | Yes |
| Keywords: | EPSILON-CAPROLACTONE POLYMERIZATION; COMPLEXES; MECHANISM |
| Institutions of the University: | Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II > Chair Macromolecular Chemistry II - Univ.-Prof. Dr. Andreas Greiner Faculties Faculties > Faculty of Biology, Chemistry and Earth Sciences Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry |
| Result of work at the UBT: | No |
| DDC Subjects: | 500 Science > 540 Chemistry |
| Date Deposited: | 29 May 2015 09:39 |
| Last Modified: | 24 Feb 2022 13:34 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/14471 |