About: Degradation of polyesteramides prepared by the anionic polymerisation of -caprolactam in the presence of poly( -caprolactone)

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About: Degradation of polyesteramides prepared by the anionic polymerisation of -caprolactam in the presence of poly( -caprolactone) Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Poly[( -caprolactam)-co-( -caprolactone)] was prepared by the anionic polymerisation of -caprolactam in the presence of poly( -caprolactone) initiated by -caprolactam magnesium bromide. Copolymers with 10-25% -caprolactone structure units were subjected to degradation. After 8-weeks abiotic hydrolysis at 60 °C the molar mass of the copolymer was significantly reduced as seen from viscosity measurements. IR spectroscopy was employed to clarify the mechanism of hydrolysis. Only small changes in molar mass were observed after composting and fungal treatment. Therefore, the effect of degradation temperature was crucial. The thermal properties of polyesteramides were studied by DSC, which showed the shift of melting endotherm and enthalpy of fusion to higher values of degraded samples compared to original one. This indicated an increase in crystalline phase content caused by reorganization of amorphous phase. Physical degradation of films was observed using SEM. Film-surface changes were apparent mainly Poly[( -caprolactam)-co-( -caprolactone)] was prepared by the anionic polymerisation of -caprolactam in the presence of poly( -caprolactone) initiated by -caprolactam magnesium bromide. Copolymers with 10-25% -caprolactone structure units were subjected to degradation. After 8-weeks abiotic hydrolysis at 60 °C the molar mass of the copolymer was significantly reduced as seen from viscosity measurements. IR spectroscopy was employed to clarify the mechanism of hydrolysis. Only small changes in molar mass were observed after composting and fungal treatment. Therefore, the effect of degradation temperature was crucial. The thermal properties of polyesteramides were studied by DSC, which showed the shift of melting endotherm and enthalpy of fusion to higher values of degraded samples compared to original one. This indicated an increase in crystalline phase content caused by reorganization of amorphous phase. Physical degradation of films was observed using SEM. Film-surface changes were apparent mainly (en) Degradace polyesteramidů připravenýchd anionickou polymerizací -kaprolaktamu za přítomnosti poly( -kaprolaktonu) (cs)
Title	Degradation of polyesteramides prepared by the anionic polymerisation of -caprolactam in the presence of poly( -caprolactone) Degradation of polyesteramides prepared by the anionic polymerisation of -caprolactam in the presence of poly( -caprolactone) (en) Degradace polyesteramidů připravenýchd anionickou polymerizací -kaprolaktamu za přítomnosti poly( -kaprolaktonu) (cs)
skos:prefLabel	Degradation of polyesteramides prepared by the anionic polymerisation of -caprolactam in the presence of poly( -caprolactone) Degradation of polyesteramides prepared by the anionic polymerisation of -caprolactam in the presence of poly( -caprolactone) (en) Degradace polyesteramidů připravenýchd anionickou polymerizací -kaprolaktamu za přítomnosti poly( -kaprolaktonu) (cs)
skos:notation	RIV/60461373:22310/05:00013633!RIV06-GA0-22310___
http://linked.open.../vavai/riv/strany	546-554
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(GA203/03/0508)
http://linked.open...iv/cisloPeriodika	3
http://linked.open...vai/riv/dodaniDat	2006
http://linked.open...aciTvurceVysledku	Bernášková, Alice Brožek, Jiří Náhlík, Josef Prokopová, Irena Roda, Jan Chromcová, Daniela
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	Vysoká škola chemicko-technologická v Praze / Fakulta chemické technologie
http://linked.open...dnocenehoVysledku	517150
http://linked.open...ai/riv/idVysledku	RIV/60461373:22310/05:00013633
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	polyesteramides; degradation; composting; fungal treatment (en)
http://linked.open.../riv/klicoveSlovo	degradation polyesteramides composting fungal treatment
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[B4B9346CE704]
http://linked.open...i/riv/nazevZdroje	Polymer Degradation and Stability
http://linked.open...in/vavai/riv/obor	CD
http://linked.open...ichTvurcuVysledku	6 (xsd:int)
http://linked.open...cetTvurcuVysledku	7 (xsd:int)
http://linked.open...vavai/riv/projekt	Copolyesters and polyesteramides with enhanced sensitivity to biodegradation
http://linked.open...UplatneniVysledku	2005
http://linked.open...v/svazekPeriodika	90
http://linked.open...iv/tvurceVysledku	Náhlík, Josef Prokopová, Irena Brožek, Jiří Roda, Jan Chromcová, Daniela Šašek, V. Bernášková, Alice
issn	0141-3910
number of pages	9 (xsd:int)
http://localhost/t...ganizacniJednotka	22310

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