Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	The Micellization of Well-Defined Single Graft Copolymers in Block Copolymer/Homopolymer Blends
Δημιουργός/Συγγραφέας:	Pavlopoulou, Eleni Chrissopoulou, Kiriaki [EL] Πίσπας, Στέργιος[EN] Pispas, Stergios Hadjichristidis, Nikos Anastasiadis, Spiros H.
Ημερομηνία:	2021-03-09
Γλώσσα:	Αγγλικά
ISSN:	2073-4360
DOI:	10.3390/polym13050833
Άλλο:	33803241
Περίληψη:	A series of well-defined (polyisoprene)2(polystyrene), I2S, single graft copolymers with similar total molecular weights but different compositions, fPS, were blended with a low molecular weight polyisoprene homopolymer matrix at a constant concentration 2 wt%, and the micellar characteristics were studied by small-angle x-ray scattering. To investigate the effect of macromolecular architecture on the formation and characteristics of micelles, the results on the single graft copolymers were compared with those of the corresponding linear polystyrene-b-polyisoprene diblock copolymers, SI. The comparison reveals that the polystyrene core chains are more stretched in the case of graft copolymer micelles. Stretching turned out to be purely a result of the architecture due to the second polyisoprene block in the corona. The micellization of a (polystyrene)2(polyisoprene), S2I, graft copolymer was also studied, and the comparison with the results of the corresponding I2S and SI copolymers emphasizes the need for a critical core volume rather than a critical length of the core-forming block, in order to have stable micelles. Finally, the absence of micellization in the case of the I2S copolymer with the highest polystyrene volume fraction is discussed. For this sample, macrophase separation occurs, with polyisoprene cylinders formed in the copolymer-rich domains of the phase-separated blends.
Τίτλος πηγής δημοσίευσης:	Polymers
Τόμος/Κεφάλαιο:	13
Τεύχος:	5
Σελίδες:	833
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry [EL] Χημική τεχνολογία[EN] Chemical technolgy
Λέξεις-Κλειδιά:	Block copolymers Micellization Single graft copolymers Small angle X-ray scattering (SAXS) Self-assembly
EU Grant identifier:	MIS 5002772
Κάτοχος πνευματικών δικαιωμάτων:	© 2021 by the authors. Licensee MDPI, Basel, Switzerland
Όροι και προϋποθέσεις δικαιωμάτων:	This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Ηλεκτρονική διεύθυνση με ανοικτή πρόσβαση (link):	https://www.mdpi.com/2073-4360/13/5/833
Έχει σχέση με:	The Micellization of Well-defined Single Graft Copolymers in Block Copolymer/Homopolymer Blends
Σημειώσεις:	Part of this research has been supported by the project “National Research Infrastructure on nanotechnology, advanced materials and micro/nanoelectronics” (MIS 5002772) implemented under the “Action for the Strategic Development on the Research and Technological Sector”, funded by the Operational Programme “Competitiveness, Entrepreneurship and Innovation” (NSRF 2014–2020) and co-financed by Greece and the European Union (European Regional Development Fund).
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο