Antioxidační účinek lignitických huminových kyselin a jejích solí na termo-oxidační stabilitu a degradaci polyvinylalkoholu

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F08%3APU71008" target="_blank" >RIV/00216305:26310/08:PU71008 - 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

Antioxidant effect of lignite humic acids and their salts on the thermo-oxidative stability/degradation of polyvinyl alcohol blends

Popis výsledku v původním jazyce

We demonstrate the antioxidant potential of humic acids in (green) polymer chemistry. Lignite humic acids and their sodium and ammonium salts were mixed at different concentrations with polyvinyl alcohol and thermogravimetry was used to assess the influence on the thermo-oxidative stability of resulted blends. Both protonized form and ammonium salt of humic acids caused the increased stability of investigated polymers in the studied concentration range (0.5-10% of humic acids in polymer). In contrast toprotonized form the ammonium salt showed also moderating effect on polymer degradation kinetics. Sodium salts caused substantially lower stabilizing effect and presence of 10% of humic matter caused even the destabilization. In all cases, however, whenthe degradation already started, the presence of humic acids and their salts caused more intensive polymer decomposition which resulted in lower weight of char.

Název v anglickém jazyce

Antioxidant effect of lignite humic acids and their salts on the thermo-oxidative stability/degradation of polyvinyl alcohol blends

Popis výsledku anglicky

We demonstrate the antioxidant potential of humic acids in (green) polymer chemistry. Lignite humic acids and their sodium and ammonium salts were mixed at different concentrations with polyvinyl alcohol and thermogravimetry was used to assess the influence on the thermo-oxidative stability of resulted blends. Both protonized form and ammonium salt of humic acids caused the increased stability of investigated polymers in the studied concentration range (0.5-10% of humic acids in polymer). In contrast toprotonized form the ammonium salt showed also moderating effect on polymer degradation kinetics. Sodium salts caused substantially lower stabilizing effect and presence of 10% of humic matter caused even the destabilization. In all cases, however, whenthe degradation already started, the presence of humic acids and their salts caused more intensive polymer decomposition which resulted in lower weight of char.

Druh

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

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

<a href="/cs/project/GA105%2F05%2F0404" target="_blank" >GA105/05/0404: Progresivní, ekonomicky efektivní neenergetické aplikace lignitu</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2008

Kód důvěrnosti údajů

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

Název periodika

Environmental Chemistry Letters

ISSN

1610-3653

e-ISSN

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Svazek periodika

6

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

5

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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