Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Stable responsive diblock copolymer micelles for rheology control
Δημιουργός/Συγγραφέας:	van Ruymbeke, E. Pamvouxoglou, A. Vlassopoulos, D. Petekidis, G. Mountrichas, G. [EL] Πίσπας, Στέργιος[EN] Pispas, Stergios
Εκδότης:	Royal Society Chemistry
Τόπος έκδοσης:	Cambridge
Ημερομηνία:	2010
Γλώσσα:	Αγγλικά
ISSN:	1744-683X
DOI:	10.1039/b916949k
Περίληψη:	Stable block copolymer micelles with crosslinked rubbery cores serve as model soft colloids with tunable rheology. We demonstrate this by studying systematically two such micelles: one with a small polyisoprene core and long polystyrene hairs that dominate the response of the system, and another with a larger polybutadiene core and shorter polystyrene hairs, exhibiting colloid-like behavior. In addition to mass concentration, we use temperature as a means to vary the volume fraction and show that achieving the same volume fraction by these two different routes yields different macroscopic properties. The number density of the particles and osmotic pressure effects are the origin of the difference. The response of these micelles to varying solvent quality conditions has unexpected rheological consequences: remarkably, for concentrated colloid-like micelles, the viscosity exhibits a non-monotonic temperature dependence. This is attributed to particle swelling and changing particle interactions with temperature. It is thus evident that such systems provide ways for tailoring the flow of soft colloids.
Τίτλος πηγής δημοσίευσης:	Soft Matter
Τόμος/Κεφάλαιο:	6
Τεύχος:	5
Σελίδες:	881-891
Θεματική Κατηγορία:	[EL] Χημεία (Γενικά)[EN] Chemistry (General) [EL] Επιστήμη (Γενικά)[EN] Science (General) [EL] Τεχνολογία (Γενικά)[EN] Technology (General) [EL] Φυσική[EN] Physics
Λέξεις-Κλειδιά:	Chemistry, Physical Materials Science, Multidisciplinary Physics, Multidisciplinary Polymer Science
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
Κάτοχος πνευματικών δικαιωμάτων:	© ROYAL SOC CHEMISTRY
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο