Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Aggregation behavior of the strong amphiphilic cationic diblock polyelectrolytes at the air/water interface
Δημιουργός/Συγγραφέας:	Ding, Yanping Chrysostomou, Varvara [EL] Πίσπας, Στέργιος[EN] Pispas, Stergios Jiang, Kun Sun, Zhaoyan Li, Hongfei
Εκδότης:	Wiley Periodicals, LLC.
Ημερομηνία:	2022-05
Γλώσσα:	Αγγλικά
ISSN:	0021-8995
DOI:	10.1002/app.52079
Περίληψη:	Effects of subphase temperature and pH on the interfacial behavior of two strong amphiphilic cationic diblock polyelectrolytes, quaternized poly(2-[dimethylamino]ethyl methacrylate)-block-poly(lauryl methacrylate) (qPDMAEMA-b-PLMA), were studied by the Langmuir film balance technique for the first time. The morphologies of their Langmuir–Blodgett (LB) films were studied by atomic force microscopy. At the air/water interface, surface micelles with hydrophobic PLMA cores and hydrophilic qPDMAEMA coronas form. With the increase of temperature, the condensed surface pressure-molecular area isotherms move to large area (right shift). The higher the temperature, the more obvious the isotherm shifts to the right. At low temperature, the isotherms of the two copolymers are almost respectively overlapped under different subphase pH conditions. At high temperature, however, the isotherms of the two copolymers show some subphase pH dependence. All initial LB films obtained at different subphase conditions exhibit isolated circular micelles. Under different subphase pH conditions, the diameters of the micelle cores in the two copolymers' LB films obtained at low temperature are close but larger than those at high temperature, which phenomenon is first reported. This is probably due to the relatively lower mobility of polymer individual chains at low temperature, resulting in their higher local surface concentration and larger aggregation.
Τίτλος πηγής δημοσίευσης:	Journal of Applied Polymer Science
Τόμος/Κεφάλαιο:	139
Τεύχος:	18
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry [EL] Χημεία[EN] Chemistry
Λέξεις-Κλειδιά:	Monolayers Polymer brushes Polyelectrolytes Stimuli-sensitive polymers Surfaces Interfaces
Κάτοχος πνευματικών δικαιωμάτων:	2021 Wiley Periodicals LLC
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://doi.org/10.1002/app.52079
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο