Publication detail

Resistance of polyvinyl alcohol blends stabilized by sodium and ammonium salts of lignite humic acids against gamma-irradiation

BAKAJOVÁ, B. ILČIN, M. HOLÁ, O. KUČERÍK, J.

Original Title

Type

journal article - other

Language

English

Original Abstract

The dried blends containing sodium and ammonium salts of lignite humic acids (humates 0.5-10 % w/w) in polyvinyl alcohol (PVA) were exposed to high dosage of c-irradiation in the range of doses 127-806 kGy. Resulted products were then tested for their stability using thermogravimetrical analysis. As a reference the nontreated blends were used since the pure PVA exposed to gamma-irradiation very quickly lost its stability and resulting consistence did not allow the stability tests. Stabilities showed a strong concentration and counterion dependency. While sodium counterion caused mostly destabilization with increasing dose, the ammonium counterion acted in an opposite way. The tests carried out in a moisturizing container revealed the changes in water absorbing capacity of irradiated samples and allowed partial explanation of humate stabilizing effect. Generally, at lower concentration of a humate the increase was observed with an increase in the c-irradiation dose and vice versa. The results confirmed the antioxidant and stabilizing effect of humic acids added to some synthetic polymers and their applicability in materials exposed to c-irradiation.

Keywords

Lignite humic acids salts, Antioxidants, Crosslinking, gamma-irradiation

Authors

BAKAJOVÁ, B.; ILČIN, M.; HOLÁ, O.; KUČERÍK, J.

RIV year

2011

Released

3. 1. 2011

Publisher

SpringerLink

Location

Hungary

ISBN

0236-5731

Periodical

Journal of Radioanalytical and Nuclear Chemistry

Year of study

287

Number

State

Hungary

Pages from

449

Pages to

458

Pages count

BibTex

@article{BUT50054,
  author="Barbora {Bakajová} and Michal {Ilčin} and Olga {Holá} and Jiří {Kučerík}",
  title="Resistance of polyvinyl alcohol blends stabilized by sodium and ammonium salts of lignite humic acids against gamma-irradiation",
  journal="Journal of Radioanalytical and Nuclear Chemistry",
  year="2011",
  volume="287",
  number="2",
  pages="449--458",
  issn="0236-5731"
}