Effect of Composition and Surface Microstructure in Self-Polarized Ferroelectric Polymer Films on the Magnitude of the Surface Potential
Valentin V. Kochervinskii,
Evgeniya L. Buryanskaya,
Mstislav O. Makeev,
Pavel A. Mikhalev,
Dmitry A. Kiselev,
Tatiana S. Ilina,
Boris V. Lokshin,
Aleksandra I. Zvyagina,
Gayane A. Kirakosyan
Affiliations
Valentin V. Kochervinskii
Laboratory of Technologies of Polymer Ferroelectrics, Bauman Moscow State Technical University, Moscow 141005, Russia
Evgeniya L. Buryanskaya
Laboratory of Technologies of Polymer Ferroelectrics, Bauman Moscow State Technical University, Moscow 141005, Russia
Mstislav O. Makeev
Laboratory of Technologies of Polymer Ferroelectrics, Bauman Moscow State Technical University, Moscow 141005, Russia
Pavel A. Mikhalev
Laboratory of Technologies of Polymer Ferroelectrics, Bauman Moscow State Technical University, Moscow 141005, Russia
Dmitry A. Kiselev
Laboratory of Physics of Oxide Ferroelectrics, Department of Materials Science of Semiconductors and Dielectrics, National University of Science and Technology MISIS, Moscow 119049, Russia
Tatiana S. Ilina
A.N. Nesmeyanov Institute of Organoelement Compounds RAS, Moscow 119049, Russia
Boris V. Lokshin
A.N. Nesmeyanov Institute of Organoelement Compounds RAS, Moscow 119049, Russia
Aleksandra I. Zvyagina
A.N. Frumkin Institute of Physical Chemistry and Electrochemistry RAS, Moscow 119071, Russia
Gayane A. Kirakosyan
A.N. Frumkin Institute of Physical Chemistry and Electrochemistry RAS, Moscow 119071, Russia
The values of the surface potentials of two sides of films of polyvinylidene fluoride, and its copolymers with tetrafluoroethylene and hexafluoropropylene, were measured by the Kelvin probe method. The microstructures of the chains in the surfaces on these sides were evaluated by ATR IR spectroscopy. It was found that the observed surface potentials differed in the studied films. Simultaneously, it was observed from the IR spectroscopy data that the microstructures of the chains on both sides of the films also differed. It is concluded that the formation of the surface potential in (self-polarized) ferroelectric polymers is controlled by the microstructure of the surface layer. The reasons for the formation of a different microstructure on both sides of the films are suggested on the basis of the general regularities of structure formation in flexible-chain crystallizing polymers.
