A5025798574- Polymer Nanocomposites and Properties
- Conducting polymers and applications
- Polymer Nanocomposite Synthesis and Irradiation
- Polymer crystallization and properties
- Dielectric materials and actuators
- Advanced Sensor and Energy Harvesting Materials
- High voltage insulation and dielectric phenomena
- Analytical Chemistry and Sensors
- biodegradable polymer synthesis and properties
- TiO2 Photocatalysis and Solar Cells
- Smart Materials for Construction
- Acoustic Wave Resonator Technologies
- Organic Electronics and Photovoltaics
- Gas Sensing Nanomaterials and Sensors
- Thin-Film Transistor Technologies
- Graphene research and applications
- Field-Flow Fractionation Techniques
- Polymer Foaming and Composites
- Zeolite Catalysis and Synthesis
- Thermal properties of materials
- solar cell performance optimization
- Surface Modification and Superhydrophobicity
- Silk-based biomaterials and applications
- Advanced Battery Technologies Research
- Transition Metal Oxide Nanomaterials
University of Belgrade
2014-2024
University of the Free State
2014-2024
Vinča Institute of Nuclear Sciences
2000-2017
Institute of Economic Sciences
2004-2008
Chemical Dynamics (United States)
2001
Nanocomposites of polyvinylidene fluoride/polymethyl methacrylate (PVDF/PMMA) blend and mechanically activated barium titanate (BaTiO3) particles were prepared by melt mixing. Modification filler means mechanical activation has a profound effect on the crystallization PVDF in matrix. Raman analysis showed that modified BaTiO3 particles, due to higher specific surfaces, induce, predominantly, electrically active β-phase PVDF, while initial micron size induce formation most common but...
Na0.25K0.25Bi0.5TiO3 (NKBT) perovskite particles are synthesized by solid-state method and used as a filler for polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) co-polymer. X-ray diffraction analysis of NKBT powders shows that the have rhombohedral crystal structure (R3c symmetry). Raman spectroscopy reveals co-polymer crystallizes predominantly into mixture polar β- γ-crystals, while there is also contribution non-polar α-crystal phase. The introduction PVDF-HFP results with an...
The secondary crystallization of aged isotactic polypropylene (iPP) different morphologies, which occurs during annealing in the vicinity melting temperature (140 °C), was studied using differential scanning calorimetry (DSC) and density measurements. results calorimetric measurements were correlated. Kinetics high (HTSC) by Avrami relations. exponents, obtained according to increase crystallinity after at 140 °C, considered as measure ability iPP crystallize secondarily. Depending on...
Abstract Electrical conductivities of low‐density polyethylene (LDPE)–carbon black (CB) composites were studied using high resistance meter at room temperature (DC conductivity) and dielectric spectroscopy (AC in the frequency range between 90 kHz 13 MHz from 120 to 355 K. DC measurements revealed a percolation threshold about 20 wt % CB content, whereas AC show two conductivity peaks 15% 23% content. The presence thresholds was attributed different dispersions particles structural...
The aim of this study was to investigate the presence wax, different Ag nanoparticle contents, and cooling rates from melt, on morphology, thermal electrical conductivity, dynamic mechanical properties iPP.The particles were well dispersed in polymer, formed nucleation centres for crystallization iPP.They also iPP/wax, but they located wax phase which between iPP spherulites.Generally extent filler agglomeration increased with increasing content.The particles, whether or phase, had little...
Abstract The process of low‐melting point (LMP) α‐phase formation in a quenched and annealed isotactic polypropylene (iPP) was studied by means differential scanning calorimetry. influence preparation conditions (quenching annealing temperatures, times sample thickness), together with the measurement parameters (heating cooling rates), on iPP melting behaviour are analysed. results reveal constant yield LMP crystals over wide range quenching temperatures. This study also suggests that...
Abstract The surface dielectric properties of acid‐etched low‐density polyethylene ( LDPE ) were analysed in the frequency range from 20 Hz to 200 kHz . Samples treated with various acids for a period one hour, at temperatures ranging 70 °C. After treatment, samples Fourier transform infrared spectroscopy, revealing chemical and crystallinity changes on surface, as direct result treatment. sample surfaces using atomic force microscopy. micrographs show that acid treatment increases roughness...
In this paper, a new simple and environmentally friendly treatment technique for obtaining polymer nanocomposites with appropriate dielectric properties has been presented. Sheets of isotactic polypropylene atactic polystyrene were immersed in 3 saturated water solutions alkali metal salts (LiCl, NaCl, KCl) at 2 fixed temperatures (23°C 90°C), DC electrical potentials (+4 kV, −4 ground potential) applied. A quantification metals the sheets was conducted by inductively coupled plasma optic...