Kamil Krysiak | Politechnika Łódzka (original) (raw)
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Papers by Kamil Krysiak
Polymer, 2015
The effect of intramolecular crosslinking (IC) (cyclization) on gelation was studied using Monte ... more The effect of intramolecular crosslinking (IC) (cyclization) on gelation was studied using Monte Carlo simulations. The consumption of crosslinker in the IC process is proposed as one of the main reasons of significant overestimation of the gel point by Flory-Stockmayer theory. The system under study is atom transfer radical polymerization (ATRP) of a monomer and bifunctional (e.g. divinyl) crosslinker. The simulation method is based on dynamic lattice liquid algorithm (DLL) and reproduces changes of the system dynamics during polymerization. The effect of cyclization on gel point for various reagents ratios and dilutions was investigated. It is shown that intramolecular crosslinking does not change significantly the gel point in condensed systems (no solvent or below 10%). By contrast, it significantly increases gel points in diluted systems (40e90% of the solvent).
Synthetic Metals, 2015
In this work we report a reproducible and efficient method of surface modification of titania nan... more In this work we report a reproducible and efficient method of surface modification of titania nanoparticles (rutile) via reversible-deactivation radical polymerization. Herein, we graft poly(di (ethylene glycol) methyl ether methacrylate) from the surface of TiO 2 in an amount of 21 wt% within the reaction time of 3 h 15 min. The amount of grafted polymer was assessed by Thermogravimetric Analysis and it is one of the highest reported till now for this ceramic nanoparticles by atom transfer radical polymerization. The properties of inorganic-organic, i.e. core-shell material, as well as of pristine TiO 2 and neat polymer were examined by Infrared and Dielectric Spectroscopies. The shape of the nanoparticles and the thickness of the polymer coating shell were investigated by means of High Resolution Transmission Electron Microscopy. The obtained nanocomposite exhibits dielectric permittivity e 0 = 18 and loss tangent around 1 Â10 À2 at 20 C. The described method allows controlling a length and chemical structure of the grafted polymer from ceramic core, thus to tailor a physical properties of nanoparticles and of nanocomposites.
Polymer, 2015
The effect of intramolecular crosslinking (IC) (cyclization) on gelation was studied using Monte ... more The effect of intramolecular crosslinking (IC) (cyclization) on gelation was studied using Monte Carlo simulations. The consumption of crosslinker in the IC process is proposed as one of the main reasons of significant overestimation of the gel point by Flory-Stockmayer theory. The system under study is atom transfer radical polymerization (ATRP) of a monomer and bifunctional (e.g. divinyl) crosslinker. The simulation method is based on dynamic lattice liquid algorithm (DLL) and reproduces changes of the system dynamics during polymerization. The effect of cyclization on gel point for various reagents ratios and dilutions was investigated. It is shown that intramolecular crosslinking does not change significantly the gel point in condensed systems (no solvent or below 10%). By contrast, it significantly increases gel points in diluted systems (40e90% of the solvent).
Synthetic Metals, 2015
In this work we report a reproducible and efficient method of surface modification of titania nan... more In this work we report a reproducible and efficient method of surface modification of titania nanoparticles (rutile) via reversible-deactivation radical polymerization. Herein, we graft poly(di (ethylene glycol) methyl ether methacrylate) from the surface of TiO 2 in an amount of 21 wt% within the reaction time of 3 h 15 min. The amount of grafted polymer was assessed by Thermogravimetric Analysis and it is one of the highest reported till now for this ceramic nanoparticles by atom transfer radical polymerization. The properties of inorganic-organic, i.e. core-shell material, as well as of pristine TiO 2 and neat polymer were examined by Infrared and Dielectric Spectroscopies. The shape of the nanoparticles and the thickness of the polymer coating shell were investigated by means of High Resolution Transmission Electron Microscopy. The obtained nanocomposite exhibits dielectric permittivity e 0 = 18 and loss tangent around 1 Â10 À2 at 20 C. The described method allows controlling a length and chemical structure of the grafted polymer from ceramic core, thus to tailor a physical properties of nanoparticles and of nanocomposites.