1. Αποθετήριο Παραδοτέων Υποτρόφων Δράσεων ΕΣΠΑ Τριτοβάθμιας Εκπαίδευσης 2017-2023
2. Όλο το Αποθετήριο
3. Ερευνητικές ομάδες

Τύπος:	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Controlled block-polymerization of styrene, divinylbenzene and ethylene oxide. Intermolecular cross-linking towards well-defined miktoarm copolymer stars
Συγγραφέας:	[EL] Μυγιάκης, Εμμανουήλ[EN] Mygiakis, Emmanouil [EL] Γλυνός, Εμμανουήλ[EN] Glynos, Emmanouil [EL] Σακελλαρίου, Γεώργιος[EN] Sakellariou, Georgios
Ημερομηνία:	30/10/2021
Περίληψη:	A novel approach for the synthesis of miktoarm copolymer stars with divinylbenzene cross-linked core, via anionic polymerization is reported. This synthetic route gives access to polymers, characterized by low dispersity values and improved structural homogeneity for both arm species. Specifically, miktoarm copolymer stars of AnBn type, with cross-linked divinylbenzene (DVB) core and arms of polystyrene (PS) and poly(ethylene oxide) (PEO), are synthesized via anionic polymerization and sequential monomer addition, employing high vacuum techniques. Analytically, the first step involves the synthesis of a triblock terpolymer PS-b-PDVB-b-PEO. Then, in the presence of a free radical initiator the pending vinyl groups of the middle DVB block cross-link intermo lecularly, leading to the final miktoarm copolymer star. The novelty of the proposed synthetic route, lies in the potassium alkoxide co-initiator, which is responsible for the controlled polymerization of both DVB and EO in one pot, without the need for end group modification between the two steps. Concerning the final polymer, there are numerous benefits advancing from this synthetic protocol, such as the control of the molecular characteristics of both arms, as well as the easily confirmed structural integrity of the precursor triblock which is inherited to the resulting miktoarm star. For comparison reasons, another batch of (PS)(PEO) miktoarm copolymers was syn thesized, following the “in-out” synthetic route. For this reason, styrene was polymerized using s-BuLi, which is used as macroinitiator for the polymerization/cross-linking of DVB, resulting PS star with DVB cross-linked core. With the addition of EO, in the presence of p4 t-Bu phosphazene base, PEO arms are polymerized, initiating from the core’s active cites outwards.
Γλώσσα:	Αγγλικά
Σελίδες:	9
DOI:	10.1016/j.eurpolymj.2021.110857
EISSN:	1873-1945
Θεματική κατηγορία:	[EL] Χημεία και Τεχνολογία διεργασιών[EN] Process Chemistry and Technology
Λέξεις-κλειδιά:	anionic polymerization; Miktoarm copolymer stars; Cross-linking; Polystyrene; Polyethylene oxide
Κάτοχος πνευματικών δικαιωμάτων:	© 2021 Elsevier Ltd. All rights reserved.
Ηλεκτρονική διεύθυνση του τεκμηρίου στον εκδότη:	https://www.sciencedirect.com/science/article/pii/S0014305721005917
Ηλεκτρονική διεύθυνση περιοδικού:	https://www.sciencedirect.com/journal/european-polymer-journal
Τίτλος πηγής δημοσίευσης:	European Polymer Journal
Τεύχος:	161
Σελίδες τεκμηρίου (στην πηγή):	Article no 110857
Σημειώσεις:	This work was co-funded by the European Union and Greek national funds through the Operational Program “ Human Resources Development, Education and Lifelong Learning ” (NSRF 2014-2020), under the call “Supporting Researchers with an Emphasis on Young Researchers – Cycle B” (MIS: 5047966). Σχετιζεται με : Emmanouil Glynos, Emmanouil Mygiakis, Georgios Sakellariou. Designing Materials at the Macromolecular Level for High Performance Solid Polymer Electrolytes. Athens Conference on Advances in Chemistry (acac2020) - http://www.acac2020.chem.uoa.gr/ACAC%20Full.pdf Σχετιζεται με : Emmanouil Mygiakis, Emmanouil Glynos and George Sakellariou. Synthesis and characterization of well-defined miktoarm star polymers, (PS)n(PEO)n. Athens Conference on Advances in Chemistry (acac2020) - http://www.acac2020.chem.uoa.gr/ACAC%20Full.pdf
Εμφανίζεται στις συλλογές:	Ερευνητικές ομάδες