Contact
    Start Publications Effect of the Density of ATRP Thiol Initiators in the Yield and ...
    ←  Publication Finder
    QSense

    Effect of the Density of ATRP Thiol Initiators in the Yield and Water Content of Grafted-From PMETAC Brushes. A Study by Means of QCM-D and Spectroscopic Ellipsometry Combined in a Single Device

    Year: 2012

    Journal: Macromolecular Chemistry and Physics, Volume 213, Issue 5, pages 549–556, March 16, 2012, 20120618

    Authors: Jagoba Iturri Ramos 1, Sergio E. Moya 1,2

    Last authors: Sergio E. Moya

    Organizations: 1 CICbiomagune, P° Miramon 182 ed. Empresarial C, Donostia-San Sebastian, Spain 2 MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China

    Country: Spain, China

    Poly {[2-(methacryloyloxy)ethyl] trimethylammonium chloride} (PMETAC) brushes are synthesized by atom transfer radical polymerization from mixed monolayers of ω-mercaptoundecyl bromoisobutyrate thiol (initiator) and 1-undecanethiol (blank). Initiator density is varied from 100% to 1% by the molar ratio of initiator to blank in solution. Brush growth is followed in situ by a single device combination of a quartz crystal microbalance with dissipation (QCM-D) and spectroscopic ellipsometry. Acoustic mass (macous) and optical mass (mopt) are simultaneously recorded. Brush hydration is calculated from the difference between macous and mopt. The percentage of water lost during brush collapse in NaCl solution at concentration from 10−3M to 1 M is quantified for each initiator density.