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Aging behavior of oxygen plasma-treated polypropylene with different crystallinities

Title
Aging behavior of oxygen plasma-treated polypropylene with different crystallinities
Authors
Yun, YIKim, KSUhm, SJKhatua, BBCho, KKim, JKPark, CE
POSTECH Authors
Cho, KKim, JKPark, CE
Date Issued
Jan-2004
Publisher
VSP BV
Abstract
Oxygen plasma-treated quenched and annealed polypropylene (PP) films with different crystallinities were investigated to characterize the surface rearrangement behavior during aging using contact-angle measurements and X-ray photoelectron spectroscopy. Optimum plasma conditions were examined by varying the power, time and pressure. Less crystalline quenched PP showed a larger increase in water contact angle and a larger decrease of oxygen atomic concentration during aging than the more crystalline annealed PP, since the oxygen species, such as hydroxyl groups, introduced by oxygen plasma treatment, oriented towards or diffused faster into the bulk with lower crystallinity. The degree of crosslinking on the surface was enhanced after plasma treatment and, in addition to increased crystallinity, the crosslinked structure induced by plasma treatment restricted chain mobility and lowered the aging rate of the PP surface.
Keywords
plasma treatment; aging; surface rearrangement; SURFACE MODIFICATION; POLYMER SURFACES; POLYETHYLENE; DYNAMICS; FILMS
URI
http://oasis.postech.ac.kr/handle/2014.oak/17694
ISSN
0169-4243
Article Type
Article
Citation
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY, vol. 18, no. 11, page. 1279 - 1291, 2004-01
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 CHO, KIL WON
Dept. of Chemical Enginrg
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