Photo‐induced graft copolymerization of acrylonitrile onto sodium salt of partially carboxymethylated guar gum

Abstract

Photo‐induced graft copolymerization of acrylonitrile (AN) onto sodium salt of partially carboxymethylated guar gum (Na‐PCMGG, DStrue¯ = 0.291) was carried out in an aqueous medium using ceric ammonium nitrate (CAN) as photo‐initiator to synthesize a novel graft copolymer, Na‐PCMGG‐g‐PAN, which may find potential application as a superabsorbent hydrogel. Studying the influence of concentrations of photo‐initiator (CAN), nitric acid, monomer (AN) as well as reaction time, temperature, and amount of substrate on the grafting yields, the reaction conditions for optimum grafting were evaluated. Maximum values of the grafting yields achieved were %G = 285.77 and %GE = 70.76 at optimized conditions. The proposed kinetic scheme could explain very well the experimental results. The influence of different kind of acids on the grafting yields was also studied. Grafting process was confirmed with the help of FTIR, thermal (TGA/DSC), and SEM techniques. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41371.

Facile synthesis of biocompatible polyglycerol hydrogel based on epichlorohydrin

“…As shown in Figure , hydroxyl group band (3433.1 cm −1 ), alkyl group band (2923.4, 2875.8, and 1460.4 cm −1 ), ether band (1115.0 cm −1 ), and epoxy band (851.6 cm −1 , weak) are recorded for PG gel specimens. And the peak at 1644.3 cm −1 is identified as the bending vibration of residual water in the sample …”

Synthesis and Characterization of Photo‐Graft Copolymers of Sodium Salt of Partially Carboxymethylated Tamarind Kernel Powder

“…The procedures followed for the isolation and purification of both the grafted products of Na‐PCMTKP were the same as discussed earlier. [ 3 ] The crude grafted products containing PMMA and PEMA were freed from their respective homopolymers by extraction with acetone and ethanol, respectively, for 48 h. After complete removal of the homopolymers (PMMA and PEMA), the pure graft copolymer samples of Na‐PCMTKP‐g‐PMMA and Na‐PCMTKP‐g‐PEMA were dried at 40 °C under vacuum.…”

“…[1] Among radiationinitiated methods, the use of the lower energy, ultraviolet (UV) radiation is found to be most encouraging and simple practical method. [2][3][4] Tamarind kernal powder (TKP) is an industrially important polysaccharide which is widely used in food (as gelling agent, thickening agent, emulsifier, stabilizer, etc. ), pharmaceuticals (as a binder in the manufacture of pills and tablets, as an excipient in making greaseless ointments and as a gelling agent in preparation of colloidal iodine gelly, etc.…”

“…[ 1 ] Among radiation‐initiated methods, the use of the lower energy, ultraviolet (UV) radiation is found to be most encouraging and simple practical method. [ 2–4 ]…”

Graft Copolymerization of Acrylonitrile onto Sodium Salt of Partially Carboxymethylated Tamarind Kernel Powder Using Ceric Ammonium Nitrate as a Photo‐Initiator in an Aqueous Medium Under Ultraviolet‐Radiation

“…Similar findings have also been found in the literature and previous study. [33,[35][36][37] Shanmugapriya et al [36] have studied the optimization of graft copolymerization of AN onto Chitosan in the presence of CAN redox initiator. They have reported the same trend with regard to the influence of monomer (AN) concentration and found to be 0.75 mol L −1 for the optimum polyacrylonitrile concentration.…”