Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Viscosity transitions driven by thermoresponsive self-assembly in PHOS- G -P(PO- R -EO) brush copolymer
Δημιουργός/Συγγραφέας:	[EL] Παπαγιαννόπουλος, Αριστείδης[EN] Papagiannopoulos, Aristeidis Zhao J. Zhang G. [EL] Πίσπας, Στέργιος[EN] Pispas, Stergios Jafta C.J.
Εκδότης:	American Chemical Society
Ημερομηνία:	2018
Γλώσσα:	Αγγλικά
ISSN:	0024-9297
DOI:	10.1021/acs.macromol.7b02711
Περίληψη:	We report on a remarkable viscosity transition of poly(p-hydroxystyrene)-graft- poly(propylene oxide-ran-ethylene oxide) (PHOS-g-P(PO-r-EO)) bottle-brush copolymers and their underlying spatial solution arrangement in aqueous solutions. The changes of morphology are measured by small-angle neutron scattering, and the rheological alterations are characterized by viscometry and video particle tracking microrheology. At room temperature core-shell micelles are formed, and the dynamics of the solutions have soft-colloidal nature. The viscosity passes through a pronounced maximum as temperature increases, and at temperatures higher than the transition regime the solutions end up as thin and milky-white dispersions of particulate clusters. The double temperature-thickening/temperature-thinning transition is related to the interactions and associations of the formed clusters. These findings are very useful for the design and application of thermoresponsive brush copolymers in a variety of fields.
Τίτλος πηγής δημοσίευσης:	Macromolecules
Τόμος/Κεφάλαιο:	51
Τεύχος:	5
Σελίδες:	1644-1653
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
Κάτοχος πνευματικών δικαιωμάτων:	© 2018 American Chemical Society.
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο