Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Thermoresponsive molecular brushes with propylene oxide/ethylene oxide copolymer side chains in aqueous solution
Δημιουργός/Συγγραφέας:	Kang, Jia-Jhen Jung, Florian A. Ko, Chia-Hsin Shehu, Kaltrina Barnsley, Lester C. Kohler, Fabian Dietz, Hendrik Zhao, Junpeng [EL] Πίσπας, Στέργιος[EN] Pispas, Stergios Papadakis, Christine M.
Εκδότης:	American Chemical Society
Ημερομηνία:	2020
Γλώσσα:	Αγγλικά
ISSN:	0024-9297 1520-5835
DOI:	10.1021/acs.macromol.0c00263
Περίληψη:	The thermoresponsive behavior of two molecular brushes having poly(propylene oxide)–poly(ethylene oxide) copolymer side chains is investigated in aqueous solution, where the side chains have longer contour lengths than the backbone. The brushes differ in the side-chain architecture; they are either a diblock (PbE) or a random copolymer (PrE). For both types of brushes, an overall rodlike shape at room temperature is revealed by cryo-electron microscopy. A polymer-rich central part and a water-rich outer part are identified by small-angle neutron scattering (SANS). Upon heating up to the cloud point, the shell of PbE weakly dehydrates, while the one of PrE severely dehydrates along with a cylinder-to-disk transformation. Moreover, the aggregates formed above the cloud points feature significantly different inner structures: PbE aggregates are composed of strongly interpenetrating brushes, while PrE aggregates consist of loosely packed brushes. These differences indicate the important role of the side-chain architecture in the thermal dehydration behavior and the associated structural changes.
Τίτλος πηγής δημοσίευσης:	Macromolecules
Τόμος/Κεφάλαιο:	53
Τεύχος:	10
Σελίδες:	4068–4081
Θεματική Κατηγορία:	[EL] Χημεία (Γενικά)[EN] Chemistry (General) [EL] Χημικά προϊόντα: Παραγωγή, χρήση κλπ[EN] Chemicals: Manufacture, use etc.
Λέξεις-Κλειδιά:	Copolymers Dynamic light scattering (DLS) Hydrophobicity Scattering Solution chemistry
Κάτοχος πνευματικών δικαιωμάτων:	Copyright © 2020 American Chemical Society
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://pubs.acs.org/doi/10.1021/acs.macromol.0c00263
Ηλεκτρονική διεύθυνση περιοδικού (link) :	https://pubs.acs.org/journal/mamobx
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο