About: Temperature-induced phase separation and hydration in poly(N-vinylcaprolactam) aqueous solutions: a study by NMR and IR spectroscopy, SAXS, and quantum-chemical calculations

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Temperature-induced phase separation in poly(N-vinylcaprolactam) (PVCL)–D2O solutions was investigated by a combination of NMR and ATR FTIR spectroscopy, SAXS and model quantum-chemical calculations. From FTIR spectra combined with DFT calculations it follows that the amount of fully dehydrated carbonyl groups in PVCL globular structures is rather small. The mechanism of the partial dehydration of PVCL carbonyls at temperatures above the phase transition was elucidated . The strong dependence of transition temperatures on polymer concentration was revealed by NMR and SAXS. NMR spectroscopy also enabled us to determine thermodynamic parameters ΔH and ΔS characterizing the phase transition. SAXS results have shown that above the transition temperature “primary mesoglobules of 50 nm in size are formed which aggregate into large agglomerates. Temperature-induced phase separation in poly(N-vinylcaprolactam) (PVCL)–D2O solutions was investigated by a combination of NMR and ATR FTIR spectroscopy, SAXS and model quantum-chemical calculations. From FTIR spectra combined with DFT calculations it follows that the amount of fully dehydrated carbonyl groups in PVCL globular structures is rather small. The mechanism of the partial dehydration of PVCL carbonyls at temperatures above the phase transition was elucidated . The strong dependence of transition temperatures on polymer concentration was revealed by NMR and SAXS. NMR spectroscopy also enabled us to determine thermodynamic parameters ΔH and ΔS characterizing the phase transition. SAXS results have shown that above the transition temperature “primary mesoglobules of 50 nm in size are formed which aggregate into large agglomerates. (en)
Title	Temperature-induced phase separation and hydration in poly(N-vinylcaprolactam) aqueous solutions: a study by NMR and IR spectroscopy, SAXS, and quantum-chemical calculations Temperature-induced phase separation and hydration in poly(N-vinylcaprolactam) aqueous solutions: a study by NMR and IR spectroscopy, SAXS, and quantum-chemical calculations (en)
skos:prefLabel	Temperature-induced phase separation and hydration in poly(N-vinylcaprolactam) aqueous solutions: a study by NMR and IR spectroscopy, SAXS, and quantum-chemical calculations Temperature-induced phase separation and hydration in poly(N-vinylcaprolactam) aqueous solutions: a study by NMR and IR spectroscopy, SAXS, and quantum-chemical calculations (en)
skos:notation	RIV/61389013:_____/12:00377123!RIV13-AV0-61389013
http://linked.open...avai/predkladatel	Ústav makromolekulární chemie AV ČR, v. v. i.
http://linked.open...avai/riv/aktivita	I P Z
http://linked.open...avai/riv/aktivity	I, P(GA202/09/1281), Z(AV0Z40500505)
http://linked.open...iv/cisloPeriodika	22
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Dybal, Jiří Spěváček, Jiří Starovoytova, Larisa Sedláková, Zdeňka Zhigunov, Alexander
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav makromolekulární chemie AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	173725
http://linked.open...ai/riv/idVysledku	RIV/61389013:_____/12:00377123
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	phase separation; coil-globule phase transition; aqueous solution (en)
http://linked.open.../riv/klicoveSlovo	coil-globule phase transition aqueous solution phase separation
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[88504650F801]
http://linked.open...i/riv/nazevZdroje	Soft Matter
http://linked.open...in/vavai/riv/obor	CD
http://linked.open...ichTvurcuVysledku	5 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	Stimuli-responsive multicomponent polymer systems in aqueous solutions and gels investigated by NMR and other methods
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	8
http://linked.open...iv/tvurceVysledku	Dybal, Jiří Starovoytova, Larisa Spěváček, Jiří Sedláková, Zdeňka Zhigunov, Alexander
http://linked.open...ain/vavai/riv/wos	000304100900018
http://linked.open...n/vavai/riv/zamer	Progresivní makromolekulární materiály a supramolekulární systémy: syntéza a studium vlastností, jevů a možností využití pro speciální aplikace a moderní technologie
issn	1744-683X
number of pages	10 (xsd:int)
http://bibframe.org/vocab/doi	10.1039/C2SM25432H
is http://linked.open...avai/riv/vysledek of	Temperature-induced phase separation and hydration in poly(N-vinylcaprolactam) aqueous solutions: a study by NMR and IR spectroscopy, SAXS, and quantum-chemical calculations

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