Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Effects of subphase pH and temperature on the interfacial behavior of double hydrophilic diblock copolymer PDEGMA‐b‐PDIPAEMA
Δημιουργός/Συγγραφέας:	Li, Jian Wen, Gangyao Selianitis, Dimitrios [EL] Πίσπας, Στέργιος[EN] Pispas, Stergios Zhang, Yu Li, Hongfei
Ημερομηνία:	2023
Γλώσσα:	Αγγλικά
ISSN:	0021-8995 1097-4628
DOI:	10.1002/app.54898
Περίληψη:	The aggregation behavior of two pH- and temperature-responsive diblock copolymers of poly[di-(ethylene glycol) methyl ether methacrylate]-block-poly[2-(diisopropylamino) ethyl methacrylate] (PDEGMA-b-PDIPAEMA) at the air/water interface and the structures of their Langmuir–Blodgett (LB) films were studied by the Langmuir monolayer technique and atomic force microscopy, respectively. At the air/water interface, PDEGMA-b-PDIPAEMA tends to form the core-shell-corona micellar structure composed of a PDIPAEMA main chain core, an amino ethyl ester shell, and a PDEGMA corona. Under acidic, neutral, and alkaline conditions, PDIPAEMA blocks are completely protonated, partially protonated, and completely non-protonated, respectively, and the protonated amino ethyl ester groups are immersed in water before monolayer compression, whereas PDEGMA coronas are adsorbed at the interface. At pH 3, 7, and 10, the limiting areas (A0) for PDEGMA42%-PDIPAEMA58% (weight percents) and PDEGMA55%-PDIPAEMA45% are 8.2/10.2/14.0 and 6.7/8.3/8.4 nm2, respectively. The A0 values of the former copolymer are larger than those of the latter. This is because the shells in the former copolymer are denser due to the higher polymerization degree of PDIPAEMA blocks, providing greater steric hindrance for PDEGMA coronas and making the latter more extended at the interface. In contrast to other copolymer systems, the effect of temperature on the isotherms of PDEGMA-b-PDIPAEMA is less obvious.
Τίτλος πηγής δημοσίευσης:	Journal of Applied Polymer Science
Τόμος/Κεφάλαιο:	141
Τεύχος:	5
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry [EL] Νανοτεχνολογία[EN] Nanotechnology
Λέξεις-Κλειδιά:	double hydrophilic block copolymers environmentally responsive polymer Langmuir monolayer LB film subphase pH
Χρηματοδότης:	Science and Technology Department, Heilongjiang Province
EU Grant identifier:	LH2020B014
Κάτοχος πνευματικών δικαιωμάτων:	© 2023 Wiley Periodicals LLC.
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://doi.org/10.1002/app.54898
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο