SYNTHESIS AND RHEOLOGICAL BEHAVIOR IN AQUEOUS-SOLUTIONS OF POLY(ACRYLAMIDE-CO-MALEIC ACID)

Water-soluble copolymers of acrylamide with maleic acid were synthesized in aqueous solution by using potassium persulfate with N,N,N',N'-tetramethyl ethylenediamine as initiator. The influences of synthetic variables on the copolymerization were investigated. The copolymers were characterized by IR and H-1-NMR spectroscopy. The copolymeric composition was obtained by using H-1-NMR method. The monomer reactivity ratios were calculated by the Kelen-Tudos method and the values of r(1) (AM) and r(2) (MA) were determined to be 11.45 and 0.0129, respectively. The theological behavior of aqueous solution of synthetic poly(acrylamide-co-maleic acid) was determined, and flowing activation energy E was calculated. (C) 1995 John Wiley and Sons, Inc.