IUVSTA 15th International Vacuum Congress (IVC-15), AVS 48th International Symposium (AVS-48), 11th International Conference on Solid Surfaces (ICSS-11)
    Applied Surface Analysis Monday Sessions
       Session AS-MoP

Paper AS-MoP8
TOF-SIMS and XPS Characterisation of Novel Perfluoropolyether-urethane Ionomers from Aqueous Dispersions

Monday, October 29, 2001, 5:30 pm, Room 134/135

Session: Student Poster Competition/Aspects of Applied Surface Analysis I Poster Session
Presenter: R. Canteri, ITC-IRST, Italy
Authors: R. Canteri, ITC-IRST, Italy
G. Speranza, ITC-IRST, Italy
M. Anderle, ITC-IRST, Italy
S. Turri, Ausimont SpA, Italy
S. Radice, Ausimont SpA, Italy
Correspondent: Click to Email
The introduction of perfluoropolyether (PFPE) bifunctional macromers, in polyurethane coatings@footnote 1,2@ has lead to an improvement of the durability characteristics and surface properties of the material, while maintaining the advantage of an easy application technology in a variety of environmental conditions and temperatures.@footnote 3@ In this work we present a surface characterisation by TOF-SIMS and XPS of a new series of polymer thin films containing PFPE macromers, applied in form of PolyUrethane Aqueous Dispersions (PUAD). In fact, environmental issues are forcing the development of waterborne polymer systems (dispersions or emulsions) to reduce the problems of solvent emissions in the atmosphere. The PUAD systems presented in this work can be defined as polyurethane ionomers, since self-dispersion in water is achieved by using co-monomers containing a -NR@sub3@ or a -COOH group, which can be salified with acids or bases. A number of experimental parameters like polymer molecular weight, crosslinking, average fluorine content as well as position of fluorinated segments in the macromolecular backbone, are investigated by selective syntheses and molecular characterization of a series of model PFPE containing polyurethane ionomers. The analysis of the outermost layer of the dried waterborne coatings by TOF-SIMS is compared with analyses by XPS obtained at two different take off angles for sampling different thickness. These results are finally compared with those obtained on the solventborne crosslinked coatings@footnote 4@ containing similar PFPE macromers. @FootnoteText@ @footnote 1@ G.Simeone, S.Turri, M.Scicchitano, C.Tonelli, Angew. Makromol. Chem. 236 (1996) 111. @footnote 2@ S.Turri, M.Scicchitano, G.Simeone, C.Tonelli, Progr. Org. Coat. 32 (1997) 205 @footnote 3@ J.Scheirs, S.Burks, A.Locaspi, Trends Polym. Sci. 3 (1995) 74 @footnote 4@ S.Turri, S.Radice, R.Canteri, G.Speranza and M.Anderle, Surface and Interface Analysis 29 (2000) 873.