Langmuir 2006, 22, 9181-9186
9181
Water-Soluble Hydrogen-Bonding Interpolymer Complex Formation between Poly(ethylene glycol) and Poly(acrylic acid) Grafted with Poly(2-acrylamido-2-methylpropanesulfonic acid) Panagiotis Ivopoulos,† Maria Sotiropoulou,† Georgios Bokias,‡ and Georgios Staikos*,† Department of Chemical Engineering and Department of Chemistry, UniVersity of Patras, GR-26504 Patras, Greece ReceiVed May 22, 2006. In Final Form: August 18, 2006 Comb-type copolymers of poly(acrylic acid) grafted with poly(2-acrylamido-2-methylpropanesulfonic acid) (PAMPSA) side chains form with poly(ethylene glycol), at low pH, water-soluble hydrogen-bonding interpolymer complexes. Turbidimetry, viscometry, and dynamic light scattering measurements suggest that compact, negatively charged, colloidal nanoparticles are formed at pH
