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Block copolymers with crystalline/amorphous, crystalline/polyelectrolyte and amorphous/polyelectrolyte blocks

2002; Wiley; Volume: 203; Issue: 10-11 Linguagem: Inglês

10.1002/1521-3935(200207)203

1521-3935

Stergios Pispas, Ekaterini Siakali‐Kioulafa, Nikos Hadjichristidis, Thomas Mavromoustakos,

biodegradable polymer synthesis and properties

Macromolecular Chemistry and PhysicsVolume 203, Issue 10-11 p. 1317-1327 Full Paper Block copolymers with crystalline/amorphous, crystalline/polyelectrolyte and amorphous/polyelectrolyte blocks Stergios Pispas, Stergios Pispas Department of Chemistry, University of Athens, Panepistimiopolis Zografou, 157 71 Athens, GreeceSearch for more papers by this authorEkaterini Siakali-Kioulafa, Ekaterini Siakali-Kioulafa Department of Chemistry, University of Athens, Panepistimiopolis Zografou, 157 71 Athens, GreeceSearch for more papers by this authorNikos Hadjichristidis, Corresponding Author Nikos Hadjichristidis [email protected] Department of Chemistry, University of Athens, Panepistimiopolis Zografou, 157 71 Athens, GreeceDepartment of Chemistry, University of Athens, Panepistimiopolis Zografou, 157 71 Athens, Greece.Search for more papers by this authorThomas Mavromoustakos, Thomas Mavromoustakos Institute of Organic and Pharmaceutical Chemistry, National Hellenic Research Foundation, 48 Vas. Konstantinou Av., 11635 Athens, GreeceSearch for more papers by this author Stergios Pispas, Stergios Pispas Department of Chemistry, University of Athens, Panepistimiopolis Zografou, 157 71 Athens, GreeceSearch for more papers by this authorEkaterini Siakali-Kioulafa, Ekaterini Siakali-Kioulafa Department of Chemistry, University of Athens, Panepistimiopolis Zografou, 157 71 Athens, GreeceSearch for more papers by this authorNikos Hadjichristidis, Corresponding Author Nikos Hadjichristidis [email protected] Department of Chemistry, University of Athens, Panepistimiopolis Zografou, 157 71 Athens, GreeceDepartment of Chemistry, University of Athens, Panepistimiopolis Zografou, 157 71 Athens, Greece.Search for more papers by this authorThomas Mavromoustakos, Thomas Mavromoustakos Institute of Organic and Pharmaceutical Chemistry, National Hellenic Research Foundation, 48 Vas. Konstantinou Av., 11635 Athens, GreeceSearch for more papers by this author First published: 02 August 2002 https://doi.org/10.1002/1521-3935(200207)203:10/11 3.0.CO;2-ZCitations: 14Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract Diblock and triblock copolymers containing polybutadiene (PB) with high 1,4-butadiene content and poly(tert-butyl methacrylate) (PtBMA) blocks were synthesized by anionic polymerization using high vacuum techniques. These polymers were transformed by homogeneous hydrogenation, using the Wilkinson catalyst, into block copolymers containing a semicrystalline polyethylene (PE) block and an amorphous semiflexible PtBMA block. Subsequent hydrolysis resulted in block copolymers with semicrystalline (PE) and polyelectrolyte (poly(methacrylic acid), PMAA) blocks. The PB/PtBMA copolymer precursors were also converted by direct hydrolysis to PB/PMAA copolymers, and subsequently to PB/poly(sodium methacrylate) amorphous/polyelectrolyte block copolymers by neutralization with NaOH. The extent of the transformation reactions was determined by solution and solid-state NMR spectroscopy. The materials containing a semicrystalline block were also characterized by differential scanning calorimetry (DSC). Some preliminary results from DSC on the phase behavior (mixing of phases and interplay between organization in the amorphous and semicrystalline phases) of these new materials are also presented. 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