Atom Trasfer Radical Polymerization of Potassium 3-Sulfopropyl Methacrylate: Direct Synthesis of Amphiphilic Block Copolymers with Methyl Methacrylate (Articolo in rivista)

Type
Label
  • Atom Trasfer Radical Polymerization of Potassium 3-Sulfopropyl Methacrylate: Direct Synthesis of Amphiphilic Block Copolymers with Methyl Methacrylate (Articolo in rivista) (literal)
Anno
  • 2004-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1021/ma0497254 (literal)
Alternative label
  • G. Masci (1); D. Bontempo (1); N. Tiso (1); M. Diociaiuti (2); L. Mannina (3,4); D. Capitani (4); V. Crescenzi (1) (2004)
    Atom Trasfer Radical Polymerization of Potassium 3-Sulfopropyl Methacrylate: Direct Synthesis of Amphiphilic Block Copolymers with Methyl Methacrylate
    in Macromolecules (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • G. Masci (1); D. Bontempo (1); N. Tiso (1); M. Diociaiuti (2); L. Mannina (3,4); D. Capitani (4); V. Crescenzi (1) (literal)
Pagina inizio
  • 4464 (literal)
Pagina fine
  • 4473 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 37 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 10 (literal)
Note
  • ISI Web of Science (WOS) (literal)
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1) Department of Chemistry, University of Rome \"La Sapienza\", P.le A. Moro 5, 00185 Rome, Italy 2) Dipartimento di Tecnologie e Salute, Istituto Superiore di Sanità, Viale R. Elena 299, 00161, Rome, Italy 3) Department of S.T.A.A.M., University of Molise, Via De Sanctis, 86100 Campobasso, Italy 4) Institute of Chemical Methodologies, CNR, Via Salaria km 29,300-00016 Monterotondo Stazione (Rome), Italy (literal)
Titolo
  • Atom Trasfer Radical Polymerization of Potassium 3-Sulfopropyl Methacrylate: Direct Synthesis of Amphiphilic Block Copolymers with Methyl Methacrylate (literal)
Abstract
  • The synthesis of potassium 3-sulfopropyl methacrylate (SPMA) homopolymers and amphiphilic block copolymers with methyl methacrylate (MMA) by ATRP in water/DMF mixed solvent at 20 °C using a Cu/bipyridine catalyst and halogen exchange is described. SPMA homopolymerization in pure water was poorly controlled even when 200% of Cu(II)Cl2 with respect to Cu(I)Cl was added, leading to a relatively high polydispersity (1.38). In water:DMF 50:50 (v/v), addition of at least 60% of Cu(II)Cl2 with respect to Cu(I)Cl allowed to obtain a good control of the polymerization. Linear kinetic plots up to very high conversion were observed and the final polydispersities were relatively low (1.15-1.25). Good self-blocking efficiencies were demonstrated by chain extension experiments even when the first block conversion before the addition of the second feed was very high (>90%). Amphiphilic block copolymers with MMA (number-average degree of polymerization Xn,SPMA ) 50, Xn,MMA ) 25) were directly prepared in water:DMF 40:60 (v/v) without using protecting group chemistry or post-polymerization derivatization. The first-order kinetic plot for MMA polymerization was linear up to 96% conversion. Two block copolymers with the same composition, p(SPMA50-b-MMA25)1pot and p(SPMA50-b-MMA25)2pot, were prepared with \"onepot\" and \"two-pot\" procedures. p(SPMA50-b-MMA25)2pot prepared using a purified pSPMA macroinitiator for MMA polymerization gave well-defined core-shell spherical micelles with an average hydrodynamic radius of about 14 nm determined by dynamic light scattering (DLS) measurements. p(SPMA50-b-MMA25)1pot prepared using the sequential monomer addition gave large micellar clusters (more than 100 nm) in addition to simple but smaller micelles. A tentative explanation to the presence of the larger aggregates was given. (literal)
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