Author(s):
1. Ivan Petronijević, Univerzitet u Beogradu, Fizički fakultet, Studentski trg 12, Beograd, Serbia
2. Dragana Cerović, University of Belgrade, Faculty of Physics, Serbia
3. Slavica Maletić, Univerzitet u Beogradu, Fizički fakultet, Studentski trg 12, Beograd, Serbia
4. Marija Šuljagić, University of Belgrade, Faculty of Technology and Metallurgy, , Serbia
5. Filip Marinković, Univerzitet u Beogradu, Fizički fakultet, Studentski trg 12, Beograd, Serbia
6. Dušan Popović, Univerzitet u Beogradu, Fizički fakultet, Studentski trg 12, Beograd, Serbia
7. Duško Dudić, Department of Chemistry, University of the Free State, Private Bag X13, Phuthaditjhaba, 9866 South A, Serbia

Abstract:
Nowadays demands towards electrical energy storage demands are great. However, present batteries have many disadvantages. Tendencies in science and technology are to overcome these problems by the application of new materials for this purpose. Blends of iPP/paraffin wax (80/20 and 90/10 weight ratio) were processed by plastograph and then foils were obtained by compression molding. Blend and neat iPP foils are treated for (24, 72, and 168) hours in a saturated water solution of LiCl at room temperature and the +4kV DC potential. Dielectric spectroscopy measurements are conducted. Specific conductivity, loss tangent, and relative dielectric constant are studied. It is noticed that blend samples with 10% and 20% paraffin wax have higher specific conductivity in comparison with iPP samples in a whole measured frequency range. The higher percentage of wax greatly influences specific conductivity rise by order of magnitude comparing treated iPP with 80/20 treated blend. All untreated samples (0, 10, 20) wax percentage has lower specific conductivity values compared to treated ones (0, 10, 20) in the whole frequency range, probably due to the incorporation of ions into samples during the treatment. Loss tangent has similar trends which are expected due to leakage currents observed by specific conductivity spectrums. Time of treatment has shown no significant changes or trends of dielectric parameters. Relative dielectric constant showed that treatment with positive DC potential influenced its value since treated samples had significant changes compared to untreated ones especially the 80/20 iPP/paraffine wax blend sample, considering that the value relative dielectric constant of paraffine wax is similar or lower than the value of iPP. Also, relaxation on this spectrum is clearly visible.

Key words:
isotactic polypropylene, paraffine wax, dielectric spectroscopy, LiCl, salt water solution treatment, DC potential

Thematic field:
SYMPOSIUM A - Science of matter, condensed matter and physics of solid states

Date of abstract submission:
28.06.2024.

Conference:
Contemporary Materials 2024 - Savremeni Materijali