Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	beta-Lactam Functionalized Poly(isoprene-b-ethylene oxide) Amphiphilic Block Copolymers
Δημιουργός/Συγγραφέας:	Kaditi, Elen [EL] Πίσπας, Στέργιος[EN] Pispas, Stergios
Εκδότης:	John Wiley & Sons, Inc.
Τόπος έκδοσης:	HOBOKEN
Ημερομηνία:	2010-01-01
Γλώσσα:	Αγγλικά
ISSN:	0887-624X
DOI:	10.1002/pola.23748
Περίληψη:	Amphiphilic block copolymers containing beta-lactam groups on the polyisoprene block were synthesized from poly (isoprene-b-ethylene oxide) (IEO) diblock copolymer precursors, prepared by anionic polymerization. beta-Lactam functionalization was achieved via reaction of the polyisoprene (PI) block with chlorosulfonyl isocyanate and subsequent reduction. The resulting block copolymers were molecularly characterized by SEC, FTIR, and NMR spectroscopies and DSC. Functionalization was found to proceed in high yields, altering the solubility properties of the PI block and those of the functionalized diblocks. Hydrogen bond formation is assumed to be responsible for the decreased crystallinity of the poly(ethylene oxide) block (PEO) in the bulk state as indicated by DSC measurements. The self-assembly behavior of the beta-lactam functionalized poly(isoprene-b-ethylene oxide) copolymers (LIEO) in aqueous solutions was studied by dynamic light scattering (DLS), static light scattering (SLS), fluorescence spectroscopy, and atomic force microscopy (AFM). Nearly spherical loose aggregates were formed by the LIEO block copolymers, having lower aggregation numbers and higher cmc values compared to the IEO precursors, as a result of the increased polarity of the beta-lactam rings incorporated in the PI blocks.
Τίτλος πηγής δημοσίευσης:	Journal of Polymer Science Part A-polymer Chemistry
Τόμος/Κεφάλαιο:	48
Τεύχος:	1
Σελίδες:	24-33
Λέξεις-Κλειδιά:	anionic polymerization amphiphilic block copolymers functionalization of polymers light scattering micelles Polymer Science
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
Κάτοχος πνευματικών δικαιωμάτων:	© 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48:24-33, 2010
Ηλεκτρονική διεύθυνση περιοδικού (link) :	http://www3.interscience.wiley.com/cgi-bin/jhome/36444
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο