Synthesis and Characterization of Poly(methyl acrylate)-grafted-Sodium Salt of Partially Carboxymethylated Tamarind Kernel Powder

Abstract

Ceric ammonium nitrate (CAN)-initiated graft copolymerization of methyl acrylate (MA) onto sodium salt of partially carboxymethylated tamarind kernel powder (Na-PCMTKP, DS = 0.15) was studied in an aqueous medium by solution polymerization technique. The growth of the graft reaction was monitored gravimetrically. The role of various synthesis variables on the grafting yields was examined to achieve the maximum graft yields (%G = 278.27, %GE = 94.38, %Hp = 5.62) and the influence of the synthesis variables in the graft copolymerization has been discussed. The reactivity of methyl acrylate (MA) towards graft copolymerization was compared with that of acrylonitrile (AN) on the basis of the results obtained from the earlier studies and plausible explanation was furnished for the observed reactivity of both the monomers towards grafting. The evaluated optimized reaction conditions were utilized to study the effect of reaction medium on grafting and it was found that reaction medium plays an important role in graft copolymerization. In order to ascertain the grafting, characterization of the samples made by FTIR, TGA and SEM was conducted. The synthesized novel graft copolymer may find potential application to be used as metal adsorbents.

Sodium Salt of Partially Carboxymethylated Sodium Alginate-g-Poly(acrylonitrile): I. Photo-Induced Synthesis, Characterization, and Alkaline Hydrolysis

“…Photo-chemical reactor supplied by Scientific Aids and Instruments Corporation (SAIC, Madras, India) was used to prepare the photo-induced graft copolymer Na-PCMSAg-PAN [23]. A known amount of Na-PCMSA (0.2-3.0 g, dry basis) dissolved in low-conductivity water (in such a way that the total volume of the reaction system remains 150 mL), and the solution was stirred at 35 • C for an hour, followed by 20 min stirring at room temperature.…”

“…To overcome this problem, graft copolymerization of different vinyl monomers onto SA has been successfully carried out using various methods [11][12][13][14][15][16][17][18][19][20][21][22]. However, a comprehensive literature survey revealed that apart from our previously reported study [23], no report has been published on the case of photo-grafting of various vinyl monomers onto sodium alginate as well as its derivatives, including carboxymethylated ones.…”

Photo-induced Synthesis, Characterization and Alkaline hydrolysis of Sodium salt of Partially Carboxymethylated Sodium Alginate–g–Poly(acrylonitrile)

“…[8][9][10][11][12][13][14][15][16][17][18] Literature survey reveals that the reports on the modification of Na-PCMSA through photo-grating are scanty. 19 In the present investigation, SA was first modified with carboxymethylation followed by photo-grafting of AN on to Na-PCMSA ( = 1.10) using CAN as a photo initiator. The reaction parameters were optimized to get the maximum grafting yields of the graft copolymer.…”