A5057180450- Silicone and Siloxane Chemistry
- Organometallic Complex Synthesis and Catalysis
- Ionic liquids properties and applications
- Synthesis and characterization of novel inorganic/organometallic compounds
- Synthesis and properties of polymers
- Polymer Nanocomposites and Properties
- Carbon dioxide utilization in catalysis
- Polymer Nanocomposite Synthesis and Irradiation
- Advanced ceramic materials synthesis
- Catalytic Cross-Coupling Reactions
- biodegradable polymer synthesis and properties
- Immunotherapy and Immune Responses
- Inorganic and Organometallic Chemistry
- Synthetic Organic Chemistry Methods
- Muon and positron interactions and applications
- Organometallic Compounds Synthesis and Characterization
- Health, Work, and Social Studies in Poland
- Energetic Materials and Combustion
- Nanomaterials and Printing Technologies
- Cancer Research and Treatments
- Oxidative Organic Chemistry Reactions
- Cultural Heritage Materials Analysis
- Dyeing and Modifying Textile Fibers
- Monoclonal and Polyclonal Antibodies Research
- Virus-based gene therapy research
University of Gdańsk
2020-2024
University of Opole
2009-2020
Centrum Onkologii
2014
The effect of incorporation octakis({alkyl}dimethylsiloxy)octasilsesquioxanes molecules with n-octyl, n-octadecyl and 4-methyl-hexyl substituents on thermal properties polypropylene (PP), low-density polyethylene (LDPE) high-density (HDPE) was investigated. Thermal those composite materials were evaluated by means the differential scanning calorimetry (DSC) thermogravimetric analysis (TG) methods. type mass% content POSS nanofillers influenced crystallization melting as well stability...
A novel group of silsesquioxane derivatives, which are siloxane-silsesquioxane resins (S4SQ), was for the first time examined as possible flame retardants in polypropylene (PP) materials. Thermal stability PP/S4SQ composites compared to S4SQ and neat PP estimated using thermogravimetric (TG) analysis under nitrogen air atmosphere. The effects non-functionalized n-alkyl-functionalized on thermostability retardancy materials were also evaluated by thermogravimetry-Fourier transform infrared...
The alkaline catalysts commonly applied to alkoxylation are characterized by a limited spectrum of activity caused an irreversible termination the polyether chains. presented results show that double metal cyanide (DMC) reduce or eliminate aforementioned adverse rearrangement hydroxyl groups. Moreover, DMC indicate high at low concentrations (ppm range), as expressed polymerization rates. It was demonstrated decreased catalyst irreversibly influence its reactivity and dispersity obtained...
Polypropylene/polyhedral oligomeric silsesquioxane (PP/POSS) nanocomposites were prepared by the melt blending method. Positron Annihilation Lifetime Spectroscopy (PALS) was used to study effects of structure and amount POSS on free volumes in PP. The PALS parameters: o-Ps lifetime its intensity, compared crystallinity degree mass flow rate (MFR) nanocomposites. presence nanofillers affected PP microstructure size number polymer. decreased intensity component increased increasing contents....
ABSTRACT Copolymerization of ethylene with iso ‐butyl substituted monoalkenyl(siloxy)‐ or monoalkenylsilsesquioxane (POSS) comonomers over bis(phenoxy‐imine) and salen‐type titanium zirconium catalysts was studied. It found that the polyreaction performance significantly depended by kind catalyst structure concentration POSS in feed. The comonomer efficiently incorporated into polymer chain at up to 0.2 mol %. differences copolymer compositions as functions were observed, including varied...
High‐density polyethylene (HDPE) and low‐density (LDPE) nanocomposites filled with octakis({alkyl}dimethylsiloxy)octasilsesquioxanes (POSS) were prepared by the melt blending method. The effects of structure content POSS nanofillers on free‐volume properties structural characteristics investigated positron annihilation lifetime spectroscopy (PALS) X‐ray diffraction methods: wide‐angle scattering (WAXS) small‐angle (SAXS). Incorporation into matrices modified arrangement polymer chains...
1-(2-Phenylethyl)-3-methylimidazolium and 1-benzyl-3-methylimidazolium chloroaluminates, [Ph-C2mim][AlCl4] [Bzlmim][AlCl4], were applied as media of the Cp2TiCl2 catalyst for biphasic ethylene polymerization. The studied aralkyl ionic liquids ensure greater stability at higher temperatures more regular morphology produced polyethylene than analogous 1-n-alkyl-3-methylimidazolium chloroaluminates. alkylaluminium compound participates in termination reaction polymer chain. is stable enables...
Various methods were used for evaluation of homogeneity polypropylene (PP) matrix composites with octakis([ n ‐octyl]dimethylsiloxy)octasilsesquioxane, ‐octadecyl]dimethylsiloxy)octasilsesquioxane, and silica (SiO 2 ) fillers. The filler dispersion was determined on the basis results from wide‐angle X‐ray scattering (WAXS) analysis, tests selected mechanical properties, scanning electron microscopy (SEM) energy dispersive spectroscopy decomposable entropic descriptor method. use different...
The copolymers of ethylene (E) with open-caged iso-butyl-substituted tri-alkenyl-silsesquioxanes (POSS-6-3 and POSS-10-3) phenyl-substituted tetra-alkenyl-silsesquioxane (POSS-10-4) were synthesized by copolymerization over the ansa-metallocene catalyst. influence kind silsesquioxane conditions on reaction performance properties was studied. In case E/POSS-6-3, positive comonomer effect observed, which associated POSS-6-3 transformation bimetallic ion pair to active catalytic species....
A series of N-n-alkylpyridinium chloroaluminate ionic liquids [C n -py][AlCl4] (where n-alkyl = n-butyl, n-hexyl, and n-octyl) was applied as a medium the Cp2TiCl2 catalyst, activated by AlEtCl2 or AlEt2Cl, to evaluate influence studied on performance biphasic liquid/hexane ethylene polymerization properties produced polyethylene (PE). The best results were obtained using N-n-butylpyridinium chloroaluminate. in have high crystallinity, which confirmed DSC, WAXS PALS methods, well bulk...
Abstract The stability of water‐based pigment dispersions is a key factor in determining their utility ink‐jet applications, and the appropriate choice dispersant plays special role. Among formulations tested to date, literature data on magenta pigments are very limited. Thus, goal this work was study influence type loading dispersants quality quinacridone dispersions. Three different commercially available were tested: (1) cationic styrene‐maleic anhydride copolymer, (2) an anionic...
Abstract A new series of hybrid compounds were designed, consisting anti-AChE and BuChE activity components with an anti-inflammatory component. 9-amino-1,2,3,4-tetrahydroacridine indomethacin derivatives synthesized. All created using alkyldiamine different chain lengths as a linker. Various biological activities evaluated, including inhibitory against AChE BuChE. The tested showed high cholinesterases. IC 50 values for all ranging from 10 nM to 7 µM. potency inhibition was much higher than...
The paper is a literature review concerning the synthesis and characterization of polymeric materials containing silsesquioxanes (POSS). methods preparation functionalized POSS-containing hybrid using click chemistry, polycondensation, polyaddition, ring-opening metathesis free-radical polymerization — both conventional controlled (ATRP) have been presented. Depending on polyreaction mechanism, type monomer used structure POSS cage, linear copolymers with silsesquioxane units in main or side...
Tetrachloroaluminate ionic liquids having 1-n-octyl-3-methylpyridinium [C8-?-mpy]+ [AlCl4]- or 1-n-octyl-4-methylpyridinium cation [C8-?-mpy]+[AlCl4]-, respectively, were investigated in the biphasic liquid/hexane mode ethylene polymerization as media of bis(cyclopentadienyl)titanium(IV)dichloride (Cp2TiCl2) titanocene catalyst activated by AlEtCl2 alkylaluminum compound. The results compared to those obtained with using 1-n-octyl-3-methylimidazolium tetrachloroaluminate liquid...
Abstract High‐density polyethylene (HDPE) composites filled with silicon‐based fillers were prepared by melt blending. The use of non‐functionalized and n ‐octyl‐functionalized siloxane‐silsesquioxane resins the sol‐gel silicas as allowed us to evaluate influence functionalization on properties composites. melting crystallization temperatures found be only slightly affected addition fillers. In turn, degree values increased, in particular for materials containing free‐volume did not change...
Non‐functionalized and n ‐alkyl‐functionalized siloxane‐silsesquioxane resins (S4SQ) were synthesized characterized to confirm their structure properties. Polypropylene (PP) composites with S4SQ as fillers prepared by the melt blending. The influence of kinds amounts on structural, morphological thermal properties well mechanical characteristics processability was determined. High compatibility functionalized resulted in more homogenous dispersion filler particles comparison which contained...