About: High-resolution solid-state NMR study of isotactic polypropylenes

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	The high-resolution solid-state 13C and 1H NMR spectra, and 13C rotating frame spin-lattice relaxation times, were measured for metallocene (m) and Ziegler-Natta (ZN) isotactic polypropylenes (iPP) within the temperature range of 20–160°C. With the rise of temperature the splitting of CH2, CH and CH3 signals into two components was detected in 13C NMR spectra and assigned to amorphous and crystalline phases. The temperature dependences of chemical shifts and integral intensities obtained from the deconvoluted spectra provided information on the main chain and CH3 groups motions in amorphous and crystalline regions of studied samples. While values of relaxation times show that the rate of segmental motion in amorphous regions in m-iPP and ZN-iPP is virtually the same, larger linewidths in 13C and 1H NMR spectra indicate somewhat larger restraints of the motion in amorphous regions of ZN-iPP. The high-resolution solid-state 13C and 1H NMR spectra, and 13C rotating frame spin-lattice relaxation times, were measured for metallocene (m) and Ziegler-Natta (ZN) isotactic polypropylenes (iPP) within the temperature range of 20–160°C. With the rise of temperature the splitting of CH2, CH and CH3 signals into two components was detected in 13C NMR spectra and assigned to amorphous and crystalline phases. The temperature dependences of chemical shifts and integral intensities obtained from the deconvoluted spectra provided information on the main chain and CH3 groups motions in amorphous and crystalline regions of studied samples. While values of relaxation times show that the rate of segmental motion in amorphous regions in m-iPP and ZN-iPP is virtually the same, larger linewidths in 13C and 1H NMR spectra indicate somewhat larger restraints of the motion in amorphous regions of ZN-iPP. (en)
Title	High-resolution solid-state NMR study of isotactic polypropylenes High-resolution solid-state NMR study of isotactic polypropylenes (en)
skos:prefLabel	High-resolution solid-state NMR study of isotactic polypropylenes High-resolution solid-state NMR study of isotactic polypropylenes (en)
skos:notation	RIV/61389013:_____/12:00370564!RIV12-AV0-61389013
http://linked.open...avai/riv/aktivita	Z
http://linked.open...avai/riv/aktivity	Z(AV0Z40500505)
http://linked.open...iv/cisloPeriodika	3
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Spěváček, Jiří
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	139035
http://linked.open...ai/riv/idVysledku	RIV/61389013:_____/12:00370564
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	material testing; metallocene isotactic polypropylene; Ziegler-Natta isotactic polypropylene (en)
http://linked.open.../riv/klicoveSlovo	material testing Ziegler-Natta isotactic polypropylene metallocene isotactic polypropylene
http://linked.open...odStatuVydavatele	HU - Maďarsko
http://linked.open...ontrolniKodProRIV	[76DE877AE328]
http://linked.open...i/riv/nazevZdroje	EXPRESS POLYMER LETTERS
http://linked.open...in/vavai/riv/obor	CD
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	7 (xsd:int)
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	6
http://linked.open...iv/tvurceVysledku	Spěváček, Jiří Chodák, I. Fričová, O. Hronský, V. Koval'aková, M. Olčák, D. Uhrínová, M.
http://linked.open...ain/vavai/riv/wos	000299169000005
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	1788-618X
number of pages	9 (xsd:int)
http://bibframe.org/vocab/doi	10.3144/expresspolymlett.2012.23

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