Ceric ammonium sulfate/sodium disulfite initiated grafting of acrylamide on to <i>Cassia reticulata</i> seed gum

Abstract

Abstract Ceric ammonium sulfate/sodium disulfite redox system was evaluated for the poly(acrylamide) (PAM) grafting on to Cassia reticulata (CR) seed gum. Grafting conditions were optimized and the maximum %Grafting (% G ) and %Efficiency (% E ) achieved were 152 and 97.2%, respectively, using [disulfite] 0.005 M ; [ceric ammonium sulfate] 0.026 M ; [acrylamide] 0.11 M ; [gum] 0.125 g/25mL at 40 ± 0.2°C. Representative CR‐grafted gum (CRPAM) was characterized by Fourier transform infrared spectrometry (FTIR), X‐ray diffraction (XRD), and thermogravimetric analysis (TGA). Under identical conditions, the redox initiator could result 142.6 % G and 91.2 % E on to guar gum (GG). Various physical properties of the CR gum/grafted CR gum, such as viscosity, water retention, and saline retention, were studied and compared with GG/grafted GG to find out the potential industrial use of CR gum and PAM‐ grafted ‐CR gum. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008