Jaroslav Mosnacek | Slovak Academy of Sciences (original) (raw)
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Papers by Jaroslav Mosnacek
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α-Diketones are widely used in various branches of industry as photoinitiators in radical polymer... more α-Diketones are widely used in various branches of industry as photoinitiators in radical polymerization, paint curing, preparation of highly sensitive photoresists, polymer grafting, dental resins, as macrophotoinitiators, etc. In this review, various methods of α-diketone preparation are presented and classified according to the starting material structure. Oxidation of ketones having in the α-position the methylene group, the hydroxy group, a halogen atom or other functional groups is described. Methods of preparation of unsaturated α-dicarbonyl compounds are described as well.
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Thanks to biocompatibility, biodegradability and availability, renewable sources like polylactide... more Thanks to biocompatibility, biodegradability and availability, renewable sources like polylactide materials have been increasingly used in various applications, such as packaging, agriculture and biomedicine. Controlled degradation of polylactide materials is very important in most of their applications. To affect their degradation rate the materials are exposed to various types of radiation. The influence of UV and visible light on changes in molecular characteristics of polylactides is reviewed. While UV radiation at λ < 300 nm leads to fast degradation of polylactide by direct photolysis, irradiation with daylight (λ > 300 nm), which is not absorbed by polylactide, leads to only slow degradation by radical processes due to the presence of impurities, fillers or photosensitizers. Polylactide can be crosslinked only after introduction of C=C bonds into polylactide chains by functionalization or copolymerization.
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Hydrogels are hydrophilic polymers with intrinsic three-dimensional structure extensively studied... more Hydrogels are hydrophilic polymers with intrinsic three-dimensional structure extensively studied as biomaterials or in agriculture as superabsorbent materials. We are described the synthesis of novel superabsorbent hydrogels based on biorenewable monomer - Tulipalin A (α-methylene-γ-butyrolactone). Tulipalin was synthesized following a procedure described by Murray. [1] The aim of the present work was to develop a synthetic method in order to synergistically combine the swelling properties of Tulipalin with practical advantages of acrylamide. These hydrogels were prepared by free radical polymerization (Figure 1) of the hydrolyzed Tulipalin (2-hydroxyethylacrylate) and acrylamide using V-50 as a water soluble initiator and BIS (N,N´-methylenebis(acrylamide)) as a crosslinker. The effect of chemical composition (acrylamide : hydrolyzed Tulipaline ratio), the concentration of monomers in water (15, 30 %) and amounts of crosslinker (0.5, 1, 1.5 %) and initiator (0.2, 0.4 %) were inves...
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J. Mater. Chem. C, 2015
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European Polymer Journal, 2015
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ACS Macro Letters, 2014
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Polymers for Advanced Technologies, 2014
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Colloid and Polymer Science, 2014
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Nano-Opto-Mechanical Systems (NOMS), 2011
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Polish Journal of Chemical Technology, 2014
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NATO Science for Peace and Security Series A: Chemistry and Biology, 2014
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Journal of Applied Physics, 2014
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Polymer, 2014
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Polymer Degradation and Stability, 2007
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Polymer, 2009
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Polymer, 2010
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Chemicke Listy
α-Diketones are widely used in various branches of industry as photoinitiators in radical polymer... more α-Diketones are widely used in various branches of industry as photoinitiators in radical polymerization, paint curing, preparation of highly sensitive photoresists, polymer grafting, dental resins, as macrophotoinitiators, etc. In this review, various methods of α-diketone preparation are presented and classified according to the starting material structure. Oxidation of ketones having in the α-position the methylene group, the hydroxy group, a halogen atom or other functional groups is described. Methods of preparation of unsaturated α-dicarbonyl compounds are described as well.
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Chemicke Listy
Thanks to biocompatibility, biodegradability and availability, renewable sources like polylactide... more Thanks to biocompatibility, biodegradability and availability, renewable sources like polylactide materials have been increasingly used in various applications, such as packaging, agriculture and biomedicine. Controlled degradation of polylactide materials is very important in most of their applications. To affect their degradation rate the materials are exposed to various types of radiation. The influence of UV and visible light on changes in molecular characteristics of polylactides is reviewed. While UV radiation at λ < 300 nm leads to fast degradation of polylactide by direct photolysis, irradiation with daylight (λ > 300 nm), which is not absorbed by polylactide, leads to only slow degradation by radical processes due to the presence of impurities, fillers or photosensitizers. Polylactide can be crosslinked only after introduction of C=C bonds into polylactide chains by functionalization or copolymerization.
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Hydrogels are hydrophilic polymers with intrinsic three-dimensional structure extensively studied... more Hydrogels are hydrophilic polymers with intrinsic three-dimensional structure extensively studied as biomaterials or in agriculture as superabsorbent materials. We are described the synthesis of novel superabsorbent hydrogels based on biorenewable monomer - Tulipalin A (α-methylene-γ-butyrolactone). Tulipalin was synthesized following a procedure described by Murray. [1] The aim of the present work was to develop a synthetic method in order to synergistically combine the swelling properties of Tulipalin with practical advantages of acrylamide. These hydrogels were prepared by free radical polymerization (Figure 1) of the hydrolyzed Tulipalin (2-hydroxyethylacrylate) and acrylamide using V-50 as a water soluble initiator and BIS (N,N´-methylenebis(acrylamide)) as a crosslinker. The effect of chemical composition (acrylamide : hydrolyzed Tulipaline ratio), the concentration of monomers in water (15, 30 %) and amounts of crosslinker (0.5, 1, 1.5 %) and initiator (0.2, 0.4 %) were inves...
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J. Mater. Chem. C, 2015
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European Polymer Journal, 2015
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ACS Macro Letters, 2014
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Polymers for Advanced Technologies, 2014
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Colloid and Polymer Science, 2014
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Nano-Opto-Mechanical Systems (NOMS), 2011
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Polish Journal of Chemical Technology, 2014
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NATO Science for Peace and Security Series A: Chemistry and Biology, 2014
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Journal of Applied Physics, 2014
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Polymer, 2014
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Polymer Degradation and Stability, 2007
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Polymer, 2009
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Polymer, 2010
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