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Graft copolymerization of PU membranes with acrylic acid and crotonic acid using benzoyl peroxide initiator
Author(s) -
Pulat Mehlika,
Babayiğit Doğan
Publication year - 2001
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.1383
Subject(s) - benzoyl peroxide , acrylic acid , polymer chemistry , grafting , monomer , copolymer , membrane , radical initiator , polymerization , chemistry , radical polymerization , aqueous solution , nuclear chemistry , materials science , organic chemistry , polymer , biochemistry
To improve water wettability of polyurethane (PU), graft copolymerization with acrylic acid (AA) and crotonic acid (CA) was performed using a benzoyl peroxide (BO) initiator. The grafting reaction was carried out by placing the membranes in aqueous solutions of AA and CA at constant temperatures. Variations of graft yield with time, temperature, initiator, and monomer concentrations were investigated. The optimum temperature, polymerization time, monomer, and initiator concentrations for AA were found to be 70°C; 3 h; 1.5 M; 5.0 × 10 −2 M, and for CA 70°C; 1 h; 1.5 M; 4.0 × 10 −2 M, respectively. The grafting membranes were characterized by FTIR spectroscopy and scanning electron microscopy (SEM) analysis, and the effect of grafting on equilibrium water content (EWC) of PU membranes was obtained by swelling measurements. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 80: 2690–2695, 2001