Surface modification of polyethylene by low keV ion beams

A. Tóth, T. Bell, I. Bertóti, M. Mohai, B. Zelei

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

Ultra-high molecular-weight polyethylene (UHMWPE) and linear polyethylene (LPE) were treated by low keV H2+, He+ and N2+ ion beams up to 2×1017 ions cm-2, and the chemical changes induced in the modified surface layer were studied by FT-IR and XPS. The concentration of vinyl groups decreased, while that of the trans-vinylene, trans-trans diene, methyl and carbonyl groups increased. The degree of polymer crystallinity was reduced. Changes in the valence band, in the C KVV Auger peak and in the plasmon loss splitting of the Cls peak indicated the occurrence of graphitisation. On treatment by N2+ ions - in addition to the above changes - nitrogen incorporation took place. The N-content of the surface layer reached a saturation value of ∼11 at% at ∼1017 ions cm-2. The Nls peak was decomposed to three components at 398.3, 400 and ∼402.8 eV, which were assigned to nitrogen in C-N, C=N (imine), and C=N with delocalised nonbonding electron pair on N, respectively.

Original languageEnglish
Pages (from-to)1131-1135
Number of pages5
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume148
Issue number1-4
DOIs
Publication statusPublished - Jan 1 1999

Keywords

  • CN
  • IR
  • Ion beam
  • Polyethylene
  • Surface structure
  • XPS

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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