Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Multifaceted pH and Temperature Induced Self-Assembly of P(DMAEMA-co-LMA)-b-POEGMA Terpolymers and Their Cationic Analogues in Aqueous Media
Δημιουργός/Συγγραφέας:	Kafetzi, Martha [EL] Πίσπας, Στέργιος[EN] Pispas, Stergios
Ημερομηνία:	2021
Γλώσσα:	Αγγλικά
ISSN:	1022-1352 1521-3935
DOI:	10.1002/macp.202000358
Περίληψη:	This work focuses on the synthesis of novel amphiphilic block terpolymers of the type poly[(2-(N,N-dimethylamino) ethyl methacrylate)-co-(lauryl methacrylate)]-b-poly[(oligo ethylene glycol) methyl ether methacrylate] (P(DMAEMA-co-LMA)-b-POEGMA)) by reversible addition-fragmentation chain transfer polymerization. The cationic amphiphilic polyelectrolyte analogs P(QDMAEMA-co-LMA)-b-POEGMA are obtained through quantitative quaternization of the DMAEMA segments. Molecular characterization by size exclusion chromatography, nuclear magnetic resonance, and Fourier Transform Infrared spectroscopies indicates the successful synthesis of these novel series of block terpolymers. The amine forms of the block copolymers respond to pH and temperature changes in aqueous solutions by forming unimolecular or multichain nanoaggregates of varying size, micropolarity, and internal structure, as indicated by light scattering and fluorescence spectroscopy techniques. At neutral and basic pH, the existence of micellar like nanoassemblies is observed in the solutions of P(DMAEMA-co-LMA)-b-POEGMA terpolymers, while aggregation into micellar-like clusters take place at temperature values above room temperature due to the presence of the hydrophobic LMA segments. Unexpectedly, the cationic polyelectrolytes P(QDMAEMA-co-LMA)-b-POEGMA counterparts show temperature responsiveness as a consequence of the amphiphilicity of the polymeric system.
Τίτλος πηγής δημοσίευσης:	Macromolecular Chemistry and Physics
Τόμος/Κεφάλαιο:	222
Τεύχος:	5
Σελίδες:	2000358
Θεματική Κατηγορία:	[EL] Χημική τεχνολογία[EN] Chemical technolgy [EL] Φασματοσκοπία[EN] Spectroscopy [EL] Χημεία (Γενικά)[EN] Chemistry (General)
Λέξεις-Κλειδιά:	Amphiphilic block terpolymers pH-responsive aggregates Random blocks Reversible addition-fragmentation Chain transfer polymerization Solution self-assembly Temperature-responsive aggregates
Κάτοχος πνευματικών δικαιωμάτων:	© 2021 Wiley-VCH GmbH
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://doi.org/10.1002/macp.202000358
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο