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Photografting of methacrylic acid on low‐density polyethylene film in presence of polyfunctional monomers
Author(s) -
Kubota Hitoshi,
Koyama Munenaka
Publication year - 1997
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/(sici)1097-4628(19970321)63:12<1635::aid-app14>3.0.co;2-z
Subject(s) - photografting , photoinitiator , tmpta , methacrylic acid , polymer chemistry , grafting , monomer , materials science , polyethylene , acrylic acid , polymer , composite material
Photografting (λ > 300 nm) of methacrylic acid (MAA) on low‐density polyethylene (PE) film (thickness = 30 and 60 μm), on which xanthone photoinitiator was coated earlier, was investigated at 60°C in the presence of polyfunctional monomers such as N,N ′‐methylenebisacrylamide (MBAAm) and trimethylol propane triacrylate (TMPTA). Addition of the polyfunctional monomers (0.01 and 0.1 wt %) to the grafting system largely accelerated the photografting, and the magnitude of the enhancement was larger for TMPTA than MBAAm. MBAAm component was incorporated into PE substrate and/or MAA‐grafted chains through the grafting reaction. Double bonds of the introduced polyfunctional component seemed to act as a new site for the grafting initiation, leading to the promoted grafting. The polyfunctional monomer did not affect distribution of the grafted chains in the cross section of the resultant MAA‐grafted film, which was measured by electron probe microanalysis. Wettability of the MAA‐grafted PE film was not influenced by the addition of MBAAm, but water absorbency was reduced by using a higher concentration of MBAAm. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 63: 1635–1641, 1997