Influence of the comonomer structure and of the initial pH on the characteristics of polyelectrolyte complexes based on maleic acid ... View Full Text


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Article Info

DATE

2012-09

AUTHORS

Irina Popescu, Dana Mihaela Suflet, Marcela Mihai

ABSTRACT

The interaction between some hydrophilic and hydrophobic maleic acid copolymers and a strong polycation, poly(diallyldimethylammonium chloride), at low concentration and different pH, with the formation of polyelectrolyte complex (PEC) dispersions, was the object of this study. Poly(maleic acid–alt–vinyl acetate) was used as hydrophilic copolymer and poly(maleic acid–alt–styrene) and poly(maleic acid–alt–2-vinylnaphthalene) were used as more hydrophobic copolymers. A special attention was given to the in-situ investigation by turbidimetry, potentiometry, and conductometry of the formed PECs and to their characterization after 24 h by optical density, dynamic light scattering and atomic force microscopy. Taking into account that the conformation of the copolymers is influenced by their neutralization degree, related to the solution pH, we had investigated the influence of this parameter on the PEC formation at pH = 6, where around half of the carboxylic groups are neutralized, and at pH = 10, at totally dissociated state. This study focused on the influence of the comonomer hydrophilic/hydrophobic nature, polyions mixing order, and starting pH of the solutions on the ratio of the complementary polyelectrolytes at the titration end-point and on the PEC particles size. More... »

PAGES

9958

References to SciGraph publications

  • 2012-02. Synthesis and polymerisation of maleoyl-L-histidine monomers and addition of histidine to an ethylene-alt-maleic co-polymer in JOURNAL OF POLYMER RESEARCH
  • 1999-03. Effect of a low-molecular-weight salt on colloidal dispersions of interpolyelectrolyte complexes in COLLOID AND POLYMER SCIENCE
  • 2008-04. Dielectric relaxation of monoesters based poly(styrene-co-maleic anhydride) copolymer in JOURNAL OF POLYMER RESEARCH
  • 2004. Preparation of monodisperse polyelectrolyte complex nanoparticles in dilute aqueous solution in AQUEOUS POLYMER DISPERSIONS
  • 2009-02. Surface properties of biospecific coatings based on polyelectrolyte complexes of maleic acid copolymers in POLYMER SCIENCE, SERIES A
  • 2011-11. Maleic acid–2-vinylnaphthalene copolymer in aqueous solution: investigation of the dissociation and fluorescence quenching in JOURNAL OF POLYMER RESEARCH
  • 1995-05. Monte Carlo Simulation Studies of Conformational Properties of Polyelectrolytes with Maleic Acid Units in POLYMER JOURNAL
  • 2004. Polyelectrolyte Complexes in POLYELECTROLYTES WITH DEFINED MOLECULAR ARCHITECTURE II
  • 1982. Interactions between macromolecules in solution and intermacromolecular complexes in INTERACTIONS BETWEEN MACROMOLECULES IN SOLUTION AND INTERMACROMOLECULAR COMPLEXES
  • 1998-02. Preparation and characterization of different polyelectrolyte complexes and their application as flocculants in COLLOID AND POLYMER SCIENCE
  • 2010-11. A randomly branched poly(hydroxyl-β-amino amide): synthesis and complexation in JOURNAL OF POLYMER RESEARCH
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