A5060241302- Polymer Nanocomposites and Properties
- Polymer composites and self-healing
- Epoxy Resin Curing Processes
- Thermal and Kinetic Analysis
- Polymer crystallization and properties
- Silicone and Siloxane Chemistry
- Flame retardant materials and properties
- Synthesis and properties of polymers
- Tribology and Wear Analysis
- biodegradable polymer synthesis and properties
- Advanced Polymer Synthesis and Characterization
- Material Properties and Applications
- Natural Fiber Reinforced Composites
- Building materials and conservation
- Hydrogels: synthesis, properties, applications
- Lignin and Wood Chemistry
- Lubricants and Their Additives
- Dental materials and restorations
- Clay minerals and soil interactions
- Photopolymerization techniques and applications
- Carbon dioxide utilization in catalysis
- Infrastructure Maintenance and Monitoring
- Polymer Science and Applications
- Dendrimers and Hyperbranched Polymers
- Food composition and properties
University of Novi Sad
2015-2024
Czech Academy of Sciences, Institute of Macromolecular Chemistry
2010-2012
Charles University
2010
Pokrajinski Sekretarijat za Nauku i Tehnološki Razvoj
2009
Abstract Aliphatic polycarbonate‐based polyurethane (PC‐PU) elastomers as well their nanocomposites with organic‐modified clay (bentonite for organic system) were synthesized. Macrodiols (MD) (randomly copolymerized aliphatic PC‐glycols of molecular weight about 2000: T5652, T4672, and T4692), hexamethylene diisocyanate, butane‐1,4‐diol used starting materials. Solid‐state NMR Fourier transform infrared spectroscopy, small‐angle X‐ray scattering, wide‐angle diffraction, atomic force...
Abstract Thermal, thermomechanical, tensile and gas transport properties of aliphatic polycarbonate‐based polyurethanes (PC‐PUs) their nanocomposites with bentonite for organic systems were studied. Hard segments are formed from hexamethylene diisocyanate butane‐1,4‐diol. All PC‐PUs feature high degree the phase separation. Three transitions detected by temperature‐modulated differential scanning calorimetry (TMDSC) dynamic mechanical thermal analysis. TMDSC revealed filler affinity both to...
A new generation biomass-based filler for natural rubber, ‘hydrochar’ (HC), was obtained by hydrothermal carbonization of hardwood waste (sawdust). It intended as a potential partial replacement the traditional carbon black (CB) filler. The HC particles were found (TEM) to be much larger (and less regular) than CB: 0.5–3 µm vs. 30–60 nm, but specific surface areas relatively close each other (HC: 21.4 m2/g 77.8 m2/g), indicating considerable porosity HC. content 71%, up from 46% in sawdust...
A kinetic model was proposed for the epoxidation of vegetable oils with peracetic acid formed in situ from acetic and hydrogen peroxide presence an acidic ion exchange resin as a catalyst. The is pseudo-homogeneous respect to Besides main reactions epoxy ring formation, takes into account side reaction opening acid. partitioning between aqueous organic phases change phases? volumes during process were considered. temperature dependency apparent rate coefficients described by reparameterized...
Abstract A biochar made by hydrothermal carbonisation treatment of hardwood waste biomass was compared with traditional carbon black (CB) filler and their impact on the electricity consumption rubber mixture, vulcanisation mechanical properties examined. Two sets experiments were conducted, following same procedure recipe using different contents (parts per hundred) or CB as a (0, 10, 20, 30, 40 50 phr). The low content fillers (up to 20 phr) showed similar for mixing. Further increase...
The kinetic model, encompassing the curing and reversion phenomena of NR/SBR rubber vulcanization process, was developed by means finite element method simultaneously with heat transfer equations, including generation due to reactions. simulation conducted for three spheres different diameters (1, 5 10 cm) two wheels, one which a commercial product industry. proposed advanced based on products’ two-dimensional axisymmetry, includes cooling after vulcanization, during crosslinking reactions...
Differential scanning calorimetry (DSC) was used to evaluate the curing kinetics of two commercial urea-formaldehyde (UF) adhesives having different formaldehyde urea (F/U) ratio 1.112 (UF1) and 1.086 (UF2). DSC measurements were done in dynamic regime with heating rates 5, 10, 15 20?C?min-1 order determine activation energy for each adhesive. Obtained data analyzed using isoconversional methods application Ozawa-Flynn-Wall Kissinger-Akahira-Sunose kinetic models. In addition, catalyst...
Natural rubber composites were reinforced by the co-fillers 'hydrochar' (HC), obtained hydrothermal carbonization of hardwood sawdust and commercial carbon black (CB). The content combined fillers was kept constant while their ratio varied. aim to test suitability HC as a partial filler in natural rubber. Due its larger particle size hence smaller specific surface area, large amounts reduced crosslinking density composites. On other hand, due unsaturated organic character, found display...
Due to their biodegradable and nontoxic nature, biopolymer composites are often used as remarkable adsorbents in treatment of wastewater. In this study chitosan/bentonite composite beads were obtained by addition clay into the polymer using solution process. Before preparation, bentonite was modified with surfactant cetyltrimethyl ammonium bromide (CTAB). The morphology examined scanning electron microscopy (SEM). Thermal properties studied simultaneous thermogravimetry coupled differential...
Abstract A series of nanocomposites were prepared by in situ polymerization styrene with different silica content (1, 3, and 5 wt%) an average particle size 7 nm. The influence nanosilica on the kinetics free radical bulk was studied isothermal differential scanning calorimetry (DSC) at temperatures (70, 80, 90°C). Using appropriate kinetic model, describing two reactions observed during (the first‐order reaction autoacceleration), it found that presence does not affect apparent activation...