AVS 49th International Symposium
    Applied Surface Science Tuesday Sessions
       Session AS-TuM

Paper AS-TuM6
Surface Composition in Isotopic Polymer Mixtures Based on ToF-SIMS and Neutron Reflectivity

Tuesday, November 5, 2002, 10:00 am, Room C-106

Session: Polymer Characterization
Presenter: K. Tanaka, Kyushu University, Japan
Authors: A. Takahara, Kyushu University, Japan
D. Kawaguchi, Kyushu University, Japan
K. Tanaka, Kyushu University, Japan
S. Tasaki, Kyoto University, Japan
M. Tozu, Ulvac-Phi, Inc., Japan
T. Hoshi, Ulvac-Phi, Inc., Japan
T. Kajiyama, Kyushu University, Japan
Correspondent: Click to Email
Surface composition in blend films composed of monodisperse polystyrene (hPS) with the number-average molecular weight, Mn, of 19.7k and deuterated monodisperse polystyrene (dPS) with Mn of 847k was examined by time-of-flight secondary ion mass spectroscopy (ToF-SIMS) in conjunction with neutron reflectivity (NR). Although hPS has higher surface energy than dPS, ToF-SIMS and NR revealed that hPS was enriched at the outermost surface of the films. The surface segregation of hPS can be accounted for by the molecular weight disparity for both components, that is, an entropic effect.