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Improvement of adhesion between polyaniline and ion‐assisted‐reaction‐treated polypropylene
Author(s) -
Lee CheolSu,
Han Sung,
Beag YoungWhoan,
Joo JinSoo,
Koh SeokKeun
Publication year - 2003
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.11666
Subject(s) - x ray photoelectron spectroscopy , contact angle , wetting , polypropylene , materials science , polyaniline , adhesion , ion , surface energy , surface roughness , polymer chemistry , polymer , oxygen , irradiation , chemical engineering , surface modification , analytical chemistry (journal) , chemistry , composite material , polymerization , organic chemistry , engineering , physics , nuclear physics
Abstract 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 × 10 14 to 1 × 10 17 ions/cm 2 . 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 CO, CO, (CO)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. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 88: 258–265, 2003