Surface changes of corona-discharge-treated polyethylene films

E. Földes, A. Tóth, E. Kálmán, E. Fekete, Ágnes Tomasovszky-Bobák

Research output: Contribution to journalArticle

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Abstract

Morphological and chemical changes of the surface of low-density polyethylene (LDPE), linear middle-density polyethylene (L-MDPE), and their 80/20 blend were studied by different techniques after corona-discharge treatment in air and subsequent annealing. The surface tension was determined by wetting; the roughness was measured by atomic force microscope (AFM), and the surface chemical composition was analyzed by X-ray photoelectron spectroscopy (XPS), whereas the low-molecular-mass fraction washed off by chloroform by FTIR. The surface tension of the films increases with the electrode current. The surface roughness depends primarily on the polymer type and is less affected by the corona treatment. At the initial stage of annealing, posttreatment-type oxidation and hydrophobic recovery are competing. The former is more pronounced in L-MDPE, the latter in LDPE. After annealing at 50°C for 160 days, hydrophobic recovery becomes predominant in each film studied, which is accompanied by significant smoothening of the surface. According to XPS and FTIR results, this is due to the migration of low-molecular-mass components (oligomers, oxidized polymer fractions, and additives) to the surface.

Original languageEnglish
Pages (from-to)1529-1541
Number of pages13
JournalJournal of Applied Polymer Science
Volume76
Issue number10
DOIs
Publication statusPublished - 2000

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Polyethylene
Polyethylenes
Molecular mass
Annealing
Surface tension
Polymers
X ray photoelectron spectroscopy
Surface roughness
Recovery
Linear low density polyethylenes
Low density polyethylenes
Chloroform
Chlorine compounds
Oligomers
Discharge (fluid mechanics)
Wetting
Microscopes
Oxidation
Electrodes
Air

ASJC Scopus subject areas

  • Polymers and Plastics

Cite this

Surface changes of corona-discharge-treated polyethylene films. / Földes, E.; Tóth, A.; Kálmán, E.; Fekete, E.; Tomasovszky-Bobák, Ágnes.

In: Journal of Applied Polymer Science, Vol. 76, No. 10, 2000, p. 1529-1541.

Research output: Contribution to journalArticle

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