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Anionic amphiphilic end-linked conetworks by the combination of quasiliving carbocationic and group transfer polymerizations

Kali, Gergely; Georgiou, Theoni K.; Iván, Béla; Patrickios, Costas S.


Gergely Kali

Theoni K. Georgiou

Béla Iván

Costas S. Patrickios


A series of amphiphilic end-linked conetworks was synthesized by the combination of two "quasiliving" polymerization techniques, quasiliving carbocationic (QLCCP) and group transfer polymerizations (GTP). The hydrophobic monomer was polyisobutylene methacrylate synthesized by the QLCCP of isobutylene and subsequent terminal modification reactions. The hydrophilic monomer was methacrylic acid (MAA) introduced via the polymerization of 2-tetrahydropyranyl methacrylate followed by acid hydrolysis after (co)network formation. The conetwork syntheses were performed by sequential monomer/crosslinker additions under GTP conditions. All the precursors and the extractables from the conetworks were characterized by gel permeation chromatography and H-1 NMR. The resulting polymer conetworks were investigated in terms of their degree of swelling (DS) in aqueous media and in tetrahydrofuran (THF) over the whole range of ionization of the MAA units and in n-hexane for uncharged conetworks. The DSs in water increased with the degree of ionization (DI) of the MAA units and the hydrophilic content in the conetwork, whereas the DSs in THF increased with the reduction of the DI of the MAA units. The effective pK of the MAA units in the conetworks increased from 8.4 to 10.5 with decreasing MAA content. These findings can facilitate the design of similar unique conetworks with adjustable swelling behavior and composition-de pendent pK values. (C) 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 4289-4301, 2009


Kali, G., Georgiou, T. K., Iván, B., & Patrickios, C. S. (2009). Anionic amphiphilic end-linked conetworks by the combination of quasiliving carbocationic and group transfer polymerizations. Journal of Polymer Science Part A: Polymer Chemistry, 47(17), 4289-4301.

Journal Article Type Article
Acceptance Date Apr 18, 2009
Online Publication Date Jul 21, 2009
Publication Date Sep 23, 2009
Deposit Date Nov 13, 2014
Journal Journal Of Polymer Science Part A-Polymer Chemistry
Print ISSN 0887-624X
Electronic ISSN 1099-0518
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 47
Issue 17
Pages 4289-4301
Keywords Amphiphiles; Amphiphilic conetworks; Cationic polymerization; Degree of ionization; Degree of swelling; End-linked conetworks; Gels; Group transfer polymerization; GTP; Living polymerization; Methacrylic acid; Polyisobutylene; Quasiliving carbocationic po
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