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Statements

Subject Item
n2:RIV%2F67985858%3A_____%2F08%3A00310259%21RIV09-AV0-67985858
rdf:type
n10:Vysledek skos:Concept
dcterms:description
Poly(high internal phase emulsion) materials were prepared from concentrated emulsions containing 4-vinylbenzyl chloride as the reactive monomer and divinylbenzene as the cross-linker. Emulsions consisted of 80 vol. % aqueous phase (water, CaCl2, initiator) and 20 vol. % of organic phase (monomers, surfactant Span 80 and a porogenic solvent). Polymerized samples were purified and investigated for morphology and porosity by scanning electron microscopy, nitrogen adsorption/ desorption and inverse steric exclusion chromatography (ISEC). It was found that no substantial additional dry porosity was achieved by the addition of solvents (as determined by nitrogen adsorption) while wet microporosity was substantially improved as determined by the ISEC method. The process of drying the polyHIPE materials also influenced the wet porosity. Poly(high internal phase emulsion) materials were prepared from concentrated emulsions containing 4-vinylbenzyl chloride as the reactive monomer and divinylbenzene as the cross-linker. Emulsions consisted of 80 vol. % aqueous phase (water, CaCl2, initiator) and 20 vol. % of organic phase (monomers, surfactant Span 80 and a porogenic solvent). Polymerized samples were purified and investigated for morphology and porosity by scanning electron microscopy, nitrogen adsorption/ desorption and inverse steric exclusion chromatography (ISEC). It was found that no substantial additional dry porosity was achieved by the addition of solvents (as determined by nitrogen adsorption) while wet microporosity was substantially improved as determined by the ISEC method. The process of drying the polyHIPE materials also influenced the wet porosity. Materiály typu polyHIPE polymerů byly připraveny z koncentrovaných emulzí obsahujícícj 4-vinylbenzil chlorid jako reaktivní monomer a divinylbenzen jako zesíťující činidlo. Emulze se skládaly z 80 obj. % vodné fáze (voda, chlorid vápenatý, iniciátor) a 20 obj. % organické fáze (monomery, surfaktant Span 80 a porogen). Po přečištění připravených polymerů byla jejich morfologie zkoumána rastrovací elektronovou mikroskopií, sorpcí/desorpcí dusíku a inverzní exkluzní chromatografií (ISEC). Bylo zjištěno, že přídavek porogenů nijak podstatně nezlepšuje porozitu suchých materiálů avšak podle zjištění metodou ISEC výrazně zlepšuje mikroporozitu ve zbobtnalém stavu. Porozitu také ovlivňoval způsob sušení
dcterms:title
Porogenic Solvents Influence on Morphology of 4-Vinylbenzyl Chloride Based polyHIPEs Porogenic Solvents Influence on Morphology of 4-Vinylbenzyl Chloride Based polyHIPEs Vliv porogenů na morfologii polyHIPE polymerů na bázi 4-vinylbenzylchloridu
skos:prefLabel
Porogenic Solvents Influence on Morphology of 4-Vinylbenzyl Chloride Based polyHIPEs Vliv porogenů na morfologii polyHIPE polymerů na bázi 4-vinylbenzylchloridu Porogenic Solvents Influence on Morphology of 4-Vinylbenzyl Chloride Based polyHIPEs
skos:notation
RIV/67985858:_____/08:00310259!RIV09-AV0-67985858
n4:aktivita
n6:Z n6:P
n4:aktivity
P(1P05ME740), Z(AV0Z40720504)
n4:cisloPeriodika
10
n4:dodaniDat
n17:2009
n4:domaciTvurceVysledku
n11:6096107 n11:5559502
n4:druhVysledku
n16:J
n4:duvernostUdaju
n7:S
n4:entitaPredkladatele
n18:predkladatel
n4:idSjednocenehoVysledku
387560
n4:idVysledku
RIV/67985858:_____/08:00310259
n4:jazykVysledku
n15:eng
n4:klicovaSlova
concentrated emulsions; morphology; porosity
n4:klicoveSlovo
n9:concentrated%20emulsions n9:morphology n9:porosity
n4:kodStatuVydavatele
US - Spojené státy americké
n4:kontrolniKodProRIV
[507DCE9D86DE]
n4:nazevZdroje
Macromolecules
n4:obor
n14:CI
n4:pocetDomacichTvurcuVysledku
2
n4:pocetTvurcuVysledku
5
n4:projekt
n12:1P05ME740
n4:rokUplatneniVysledku
n17:2008
n4:svazekPeriodika
41
n4:tvurceVysledku
Soukupová, Krasimira Jeřábek, Karel Štefanec, D. Pulko, I. Krajnc, P.
n4:wos
256058000024
n4:zamer
n13:AV0Z40720504
s:issn
0024-9297
s:numberOfPages
4