02196nas a2200241   4500008004100000022001400041245012300055210006900178260007600247300001400323490000800337520130900345653001701654653001701671653002001688653002101708653001301729100001601742700002101758700002601779700001701805856013201822       2011                        eng d  a0021-899500aAlginic acid-g-poly(N-vinylformamide) graft copolymer: synthesis, characerization, swelling, and flocculation property0 aAlginic acidgpolyNvinylformamide graft copolymer synthesis chara  aCOMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USAbWILEY-BLACKWELLcAUG  a1400-14070 v1213 a<p>The graft copolymer of N-vinylformamide with alginic acid was synthesized by free radical polymerization using potassium peroxymonosulphate and thiourea as redox pair in inert atmosphere. The optimum conditions for maximum grafting have been determined by varying the concentrations of N-vinylformamide, potassium peroxymonosulphate, thiourea, sulfuric acid, alginic acid as well as time duration and temperature. The grafting parameters increase up to the certain concentrations of N-vinylformamide, potassium peroxymonosulhate, thiourea, and hydrogen ion while thereafter grafting parameters decrease. The effect of alginic acid concentration on grafting parameters has been observed to decrease continuously. It has also been found that grafting parameters increase up to certain time and temperature, respectively, and thereafter decrease. The swelling properties of graft copolymer in terms of swelling ratio and percent swelling are investigated. Flocculation property of pure and grafted sample for both coking and noncoking coals is also investigated for the treatment of coal mine waste water. The graft copolymer has been characterized by Fourier transform infrared spectroscopy as well as thermogravimetic analysis. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 121: 1400-1407, 2011</p>10aalginic acid10aflocculation10aGraft copolymer10aN-vinylformamide10aswelling1 aSand, Arpit1 aYadav, Mithilesh1 aMishra, Dinesh, Kumar1 aBehari, Kunj  uhttps://library.ncl.res.in/content/alginic-acid-g-polyn-vinylformamide-graft-copolymer-synthesis-characerization-swelling-and-0