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Statements

Subject Item
n2:RIV%2F00216275%3A25310%2F13%3A39897379%21RIV14-MSM-25310___
rdf:type
n9:Vysledek skos:Concept
dcterms:description
Nowadays, UV curable systems (inks, varnishes) are frequently used in printing industry. Their unquestionable advantages are the absence of volatile organic compounds, good chemical resistance and short curing times (fractions of second). A disadvantage of a UV-cured system is the possibility of migration of unreacted photoinitiators, monomers and other substances from the cured polymeric film. This parameter is of high importance in food packaging industry. In most cases, migration is an unwanted effect during which the unreacted photoinitiator or binder can be released from the package, contaminate and affect the food. In some cases, slow migration of antioxidants from packages to food is used intentionally. Here, the antioxidants act positively on the food quality. This paper is aimed at research of curing and migration of substances from a cationically polymerizable system containing iron-arene photoinitiator Irgacure 261 and epoxidic binder Celloxide 2021P. System curing was monitored at different concentrations of photoinitiator via infra-red spectroscopy. By UV/VIS spectroscopy, migration of photoinitiators was monitored under different curing conditions and times of extraction. Results show that the greatest effect on the extracted amount of photoinitiator had the concentration of the photoinitiator in the curing systems. With increasing curing time, the amount of extracted photoinitiator decreased but this decrease was not significant. The UV/VIS spectroscopy data analysis is generally suitable for the determination of migration of substances from simple systems (two or three components), but for more complex systems is not appropriate. With larger number of components (commercial inks and varnishes), there will be overlap of the absorption spectra of individual components and thus not possible to determine their concentration in the extract. Nowadays, UV curable systems (inks, varnishes) are frequently used in printing industry. Their unquestionable advantages are the absence of volatile organic compounds, good chemical resistance and short curing times (fractions of second). A disadvantage of a UV-cured system is the possibility of migration of unreacted photoinitiators, monomers and other substances from the cured polymeric film. This parameter is of high importance in food packaging industry. In most cases, migration is an unwanted effect during which the unreacted photoinitiator or binder can be released from the package, contaminate and affect the food. In some cases, slow migration of antioxidants from packages to food is used intentionally. Here, the antioxidants act positively on the food quality. This paper is aimed at research of curing and migration of substances from a cationically polymerizable system containing iron-arene photoinitiator Irgacure 261 and epoxidic binder Celloxide 2021P. System curing was monitored at different concentrations of photoinitiator via infra-red spectroscopy. By UV/VIS spectroscopy, migration of photoinitiators was monitored under different curing conditions and times of extraction. Results show that the greatest effect on the extracted amount of photoinitiator had the concentration of the photoinitiator in the curing systems. With increasing curing time, the amount of extracted photoinitiator decreased but this decrease was not significant. The UV/VIS spectroscopy data analysis is generally suitable for the determination of migration of substances from simple systems (two or three components), but for more complex systems is not appropriate. With larger number of components (commercial inks and varnishes), there will be overlap of the absorption spectra of individual components and thus not possible to determine their concentration in the extract.
dcterms:title
Effect of concentration of iron-arene photoinitiator on its migration from cured polymer film Effect of concentration of iron-arene photoinitiator on its migration from cured polymer film
skos:prefLabel
Effect of concentration of iron-arene photoinitiator on its migration from cured polymer film Effect of concentration of iron-arene photoinitiator on its migration from cured polymer film
skos:notation
RIV/00216275:25310/13:39897379!RIV14-MSM-25310___
n9:predkladatel
n15:orjk%3A25310
n3:aktivita
n6:I n6:S
n3:aktivity
I, S
n3:cisloPeriodika
prosinec
n3:dodaniDat
n16:2014
n3:domaciTvurceVysledku
n12:5263034 n12:7406444 n12:3446913
n3:druhVysledku
n10:J
n3:duvernostUdaju
n18:S
n3:entitaPredkladatele
n13:predkladatel
n3:idSjednocenehoVysledku
71423
n3:idVysledku
RIV/00216275:25310/13:39897379
n3:jazykVysledku
n14:eng
n3:klicovaSlova
cationic polymerization; photoinitiator; migration
n3:klicoveSlovo
n7:migration n7:photoinitiator n7:cationic%20polymerization
n3:kodStatuVydavatele
CZ - Česká republika
n3:kontrolniKodProRIV
[F30311034520]
n3:nazevZdroje
Scientific Papers of the University of Pardubice, Series A, Faculty of Chemical Technology
n3:obor
n11:CD
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
3
n3:rokUplatneniVysledku
n16:2013
n3:svazekPeriodika
19
n3:tvurceVysledku
Němec, Petr Škola, Ondřej Jašúrek, Bohumil
s:issn
1211-5541
s:numberOfPages
8
n8:organizacniJednotka
25310