Publication detail

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.

Original Title

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

Type

journal article - other

Language

English

Original Abstract

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.

Keywords

lignite humic acids, antioxidants, thermal analysis, stability

Authors

KUČERÍK, J.; BAKAJOVÁ, B.; PEKAŘ, M.

RIV year

2008

Released

8. 11. 2008

ISBN

1610-3653

Periodical

Environmental Chemistry Letters

Year of study

6

Number

1

State

Federal Republic of Germany

Pages from

241

Pages to

245

Pages count

5

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"
}