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Surface modification by continuous graft copolymerization. II. Photoinitiated graft copolymerization onto polypropylene film surface
Author(s) -
Zhang Pei Yao,
Rånby Bengt
Publication year - 1991
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.1991.070430401
Subject(s) - photografting , copolymer , photoinitiator , materials science , polymer chemistry , grafting , polypropylene , surface modification , benzophenone , acetone , solvent , contact angle , adhesion , chemical engineering , chemistry , monomer , composite material , polymer , organic chemistry , engineering
A method for photochemically induced graft copolymerization of acrylamide (AM) onto polypropylene (PP) film surface by a continuous presoaking process under nitrogen atmosphere has been developed. After removal of homopolymer formed, ESCA, UV spectroscopy, contact angle, and adhesion measurements confirmed a photografted layer on the surface of the PP film. The results from spectral analysis and surface properties measurements were consistent. The best grafting yield was obtained for 7–10 s irradiation time. Stabilizing additives in the PP film had no evident effect on the photografting. Benzophenone was an efficient photoinitiator for photografting of PP film with AM. An AM concentration of 0.5–1.3 M in the presoaking solution was appropriate in the present case. Acetone was the best solvent among the three alifatic ketones tested (acetone, methylethylketone, and methylpropylketone).