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URN: urn:nbn:de:swb:90-650844
DOI: 10.1039/C6PY01840H
Zitationen: 4

Self-reporting dynamic covalent polycarbonate networks

Schenzel, Alexander M.; Moszner, Norbert; Barner-Kowollik, Christopher

Abstract (englisch):
Here, we report the first-time development of polycarbonate networks with self-reporting thermoreversible bonding/debonding on demand properties. The reversible linkages within the network are based on a Hetero–Diels–Alder (HDA) moiety, which is able to undergo cleavage and rebonding as a function of temperature within minutes. As HDA pair a phosphoryl dithioester and a cyclopentadiene moiety are employed as bonding and debonding take place in the temperature range between 25–120 °C. The degradation and rebonding can be readily traced by visible inspection due to the self-reporting nature of the HDA moiety. In order to prove the reversibility, linear polycarbonates (Mw = 4.200–20.000 g mol−1) including the reversible linkage in each repeating unit were generated and carefully analyzed using size exclusion chromatography (SEC), UV/Vis analysis and high temperature 1H NMR spectroscopy. Subsequently, polycarbonate networks bearing HDA units – allowing the networks to be fully degraded into small molecules – were synthesized, debonded and bonded several times in the temperature range between 25 and 120 °C within minutes. The present stu ... mehr

Zugehörige Institution(en) am KIT Institut für Biologische Grenzflächen (IBG)
Institut für Technische Chemie und Polymerchemie (ITCP)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator ISSN: 1759-9954, 1759-9962
KITopen ID: 1000065084
HGF-Programm 47.02.03; LK 01
Erschienen in Polymer chemistry
Band 8
Heft 2
Seiten 414–420
Bemerkung zur Veröffentlichung This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
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