Institute of Physics
Topic
Free-volume properties and positronium formation in modified photopolymer networks studied by positron annihilation
PhD. program
Nuclear and subnuclear physics
Year of admission
2025
Name of the supervisor
RNDr. Ondrej Šauša, CSc.
Contact:
Receiving school
Faculty of Mathematics, Physics and Informatics
Annotation
Using positronium probe and positron annihilation lifetime spectroscopy techniques, the free-volume properties of networks and positronium formation in selected photopolymers (based on dimethacrylates, acrylated epoxidized soybean oils, etc.) will be investigated. Their networks and thus their free-volume properties will be modified with the aim of their optimization for potential use in various fields of practice. The local free volume in the polymers will be determined from measurements of orthopositronium lifetimes. The radioisotope 22Na will be used as a positron source. The free volume properties will be compared with other properties of the network, investigated by techniques such as Electron Paramagnetic Resonance and Infrared Spectroscopy.