Degradace polyesteramidů připravenýchd anionickou polymerizací -kaprolaktamu za přítomnosti poly( -kaprolaktonu)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F05%3A00013633" target="_blank" >RIV/60461373:22310/05:00013633 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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 subjectedto 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 masswere 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 ap

Název v anglickém jazyce

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

Popis výsledku anglicky

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 subjectedto 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 masswere 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 ap

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CD - Makromolekulární chemie

OECD FORD obor

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Projekt

<a href="/cs/project/GA203%2F03%2F0508" target="_blank" >GA203/03/0508: Kopolyestery a polyesteramidy se zvýšenou citlivostí k biodegradaci</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2005

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Polymer Degradation and Stability

ISSN

0141-3910

e-ISSN

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Svazek periodika

90

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

546-554

Kód UT WoS článku

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EID výsledku v databázi Scopus

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