Title Molecular Weight Determination by Visualization of Stretched Polycation Molecules
Date 30.08.2006
Number 14172
Abstract PMSE 332 - The 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006<br /><br />The standard methods of molecular weight determination are hardly applicable to polyelectrolytes and macromolecules with complex architecture, such as molecular brushes. The direct visualization of the adsorbed polymer chains and subsequent measuring of their contour length by tapping mode atomic force microscopy could, in principle, allow for the determination of the molecular weight if the following two requirements are fulfilled: i) the whole molecular contour is properly resolved; ii) the length of a monomer unit is known. We report on the conditions to stretch and align polycation chains by spin-coating onto mica upon the co-deposition with octylamine which provides hydrophobization of mica. In this work the contour length of adsorbed polystyrene-graft-poly(2-vinyl pyridine) molecules was determined and the molecular weight was calculated.
Publisher Polymeric Materials: Science and Engineering
Citation Polymeric Materials: Science and Engineering 51 (2006) 595-596
Authors Bocharova, V. ; Kiriy, A. ; Stamm, M. ; Stoffelbach, F. ; Jérome, R. ; Detrembleur, C.

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