Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Micellar and fractal aggregates formed by two triblock terpolymers with different arrangements of one charged, one neutral hydrophilic and one hydrophobic block
Δημιουργός/Συγγραφέας:	[EL] Παπαγιαννόπουλος, Αριστείδης[EN] Papagiannopoulos, Aristeidis Karayianni M. Mountrichas G. [EL] Πίσπας, Στέργιος[EN] Pispas, Stergios Radulescu A.
Εκδότης:	Elsevier Ltd
Ημερομηνία:	2015
Γλώσσα:	Αγγλικά
ISSN:	0032-3861
DOI:	10.1016/j.polymer.2015.03.004
Περίληψη:	We have studied the self-assembled structures of two triblock amphiphilic polyelectrolytes of different topologies, containing a charged poly[sodium(sulfamate/carboxylate)isoprene] (SCPI) block, a polystyrene (PS) hydrophobic block and a hydrophilic neutral poly(ethylene oxide) (PEO) block in aqueous solutions, using Small Angle Neutron Scattering (SANS) and Light Scattering (LS). SANS reveals micellar and fractal aggregates in coexistence for both systems. In the case of SCPI-b-PS-b-PEO there is a higher content in fractal aggregates in comparison with PS-b-SCPI-b-PEO. In both cases the micellar aggregates are stable under different solution conditions, whereas the fractal aggregates appear to break upon addition of salt in the PS-b-SCPI-b-PEO system. The detailed picture of the micellar aggregates is consistent with the anticipated morphology of charged and neutral spherical macromolecular brushes, extended to mixed and sequential brushes. The analytical description obtained by SANS is used to interpret the LS data which is very sensitive to the presence of two species and therefore provides information on average values of the measured parameters.
Τίτλος πηγής δημοσίευσης:	Polymer
Τόμος/Κεφάλαιο:	63
Σελίδες:	134-143
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry
Λέξεις-Κλειδιά:	Fractal aggregates Micelles Triblock terpolymers
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
Κάτοχος πνευματικών δικαιωμάτων:	© 2015 Elsevier Ltd. All rights reserved.
Όροι και προϋποθέσεις δικαιωμάτων:	All Open Access, Green
Σημειώσεις:	Seventh Framework Programme, FP7; European Commission, EC; European Social Fund, ESF The SANS experiments have been supported by the European Commission under the 7th Framework Programme through the Key Action: Strengthening the European Research Area, Research Infrastructures. Contract no.: 226507 (NMI3) . Financial support by the NANOMACRO 1129 project which is implemented in the framework of the Operational Program “Education and Life-long Learning” of the National Strategic Reference Program-NSRF (Action “ARISTEIA I”) and it is co-funded by the European Union (European Social Fund-ESF) .
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο