H/D isotopic exchange in water interactions with the ferroelectric copolymer: Poly(vinylidene fluoride-trifluoroethylene) (70%:30%)

Luis G Rosa; I N Yakovkin; P A Dowben

doi:10.1021/jp051737j

H/D isotopic exchange in water interactions with the ferroelectric copolymer: Poly(vinylidene fluoride-trifluoroethylene) (70%:30%)

J Phys Chem B. 2005 Jul 28;109(29):14189-97. doi: 10.1021/jp051737j.

Authors

Luis G Rosa¹, I N Yakovkin, P A Dowben

Affiliation

¹ Department of Physics and Astronomy and the Center for Materials Research and Analysis, University of Nebraska, Lincoln, Nebraska 68588-0111, USA.

PMID: 16852782
DOI: 10.1021/jp051737j

Abstract

For both water and heavy water adsorption and absorption on crystalline poly(vinylidene fluoride with trifluoroethylene (30%)), P(VDF-TrFE 70:30), two distinctly different adsorption sites have been identified by thermal desorption spectroscopy. One adsorbed water species resembles ice and there is also an absorbed water species that interacts more strongly with the polymer thin film, and in addition, there is a polymer surface (polymer to ice interface) water species. We find that there is H/D exchange between the water or heavy water molecules and the ferroelectric polymer (largely -(CH2-CF2)-), particularly at the polymer surface.