Improvement of adhesion between polyaniline and ion-assisted-reaction-treated polypropylene

Cheol Su Lee, Sung Han, Young Whoan Beag, Jin Soo Joo, Seok Keun Koh

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


A nonwettable polypropylene (PP) surface was modified by an ion-assisted reaction (IAR) to improve its adhesion with a conjugated polymer, polyaniline (PAN). Hydrogen ions with energies ranging from 0.6 to 1 keV were irradiated on the PP surface in an oxygen gas environment. Ion doses were in the range 5 × 1014 to 1 × 1017 ions/cm2. The lowest static wetting angle of the irradiated PP without blowing oxygen gas was about 60°, but that of IAR-treated PP was less than 10°; the surface free energy of the modified PP was larger than 64 dyne/cm, and adhesion between PAN and PP passed the Scotch tape test. The main contribution to this improvement was the high concentration of hydrophilic groups on PP. Surface chemistry was investigated by X-ray photoelectron spectroscopy, and hydrophilic functional groups such as C-O, C=O, (C=O)-O were not washed with water. Surface morphology was observed with atomic force microscopy, and surface roughness changed from 8.30 to 20.8 nm after the treatment.

Original languageEnglish
Pages (from-to)258-265
Number of pages8
JournalJournal of Applied Polymer Science
Issue number2
Publication statusPublished - 2003 Apr 11


  • Adhesion
  • Conjugated polymers
  • Poly(propylene) (PP)

ASJC Scopus subject areas

  • General Chemistry
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry


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