Detail publikace

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

KUČERÍK, J. BAKAJOVÁ, B. PEKAŘ, M.

Originální název

Typ

článek v časopise - ostatní, Jost

Jazyk

angličtina

Originální abstrakt

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 to protonized 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, when the degradation already started, the presence of humic acids and their salts caused more intensive polymer decomposition which resulted in lower weight of char.

Klíčová slova

lignite humic acids, antioxidants, thermal analysis, stability

Autoři

KUČERÍK, J.; BAKAJOVÁ, B.; PEKAŘ, M.

Rok RIV

2008

Vydáno

8. 11. 2008

ISSN

1610-3653

Periodikum

Environmental Chemistry Letters

Ročník

Číslo

Stát

Spolková republika Německo

Strany od

241

Strany do

245

Strany počet

BibTex

@article{BUT45325,
  author="Jiří {Kučerík} and Barbora {Bakajová} and Miloslav {Pekař}",
  title="Antioxidant effect of lignite humic acids and their salts on the thermo-oxidative stability/degradation of polyvinyl alcohol blends",
  journal="Environmental Chemistry Letters",
  year="2008",
  volume="6",
  number="1",
  pages="241--245",
  issn="1610-3653"
}