H. Kubota et al., Effect of photoirradiation on potassium persulfate-surface oxidation of low-density polyethylene film, POLYM DEGR, 72(2), 2001, pp. 223-227
Surface oxidation of low-density polyethylene (PE) film (thickness = 30 mum
) with potassium persulfate (KPS) was investigated at 50 degreesC in water.
The surface oxidation was followed by ATR-IR measurement of the oxidized P
E film, where the absorbance ratio of the carbonyl group at 1716 cm(-1) to
the methylene group at 1460 cm(-1) was used as a measure of the oxidation.
The absorbance ratio increased with increasing the reaction time (similar t
o 12 h) and the concentration of KPS (0.01-0.30 mol/l). The decomposition o
f KPS was largely accelerated by photoirradiation (lambda > 290 nm), result
ing in the promoted surface oxidation of PE film, by which hydroxyl groups
were introduced on the oxidized surface. Vinyl monomers such as acrylamide,
N-isopropylacrylamide and glycidyl methacrylate could be grafted onto the
oxidized surface using eerie salt initiator, which was confirmed by ATR-IR
measurement of the grafted films. (C) 2001 Elsevier Science Ltd. Ail rights
reserved.