“…To study the pH-responsiveness of the sample buffer solution with pH 2 and 9 were used. The swelling ratio was calculated as follows [15] : Swelling ratio = (weight of swollen sample-weight of dry sample)/weight of dry sample.…”
“…To study the pH-responsiveness of the sample buffer solution with pH 2 and 9 were used. The swelling ratio was calculated as follows [15] : Swelling ratio = (weight of swollen sample-weight of dry sample)/weight of dry sample.…”
“…The obtained grafted part has been filtered, dried and weighed. Further, the homopolymer can be prepared by the procedure of my previous published research paper [15].…”
Section: Procedures For Graft Copolymerizationmentioning
Abstract:The present paper reports the modification of guar gum through the grafting of 2-acrylamidoglycolic acid by free radical polymerization using an efficient potassium peroxydiphosphate/thioacetamide redox system in nitrogen atmosphere. The reaction conditions for maximum grafting have been optimized by varying the reaction variables including the concentration of 2-acrylamidoglycolic acid (5.3×10-2 mol dm ), guar gum (1 g dm −3 ) along with time duration (150 min) and temperature (35°C). Water swelling capacity and flocculation and studies of synthesized graft copolymer have been performed with respect to the parent polymer. The graft copolymer has been characterized by Fourier transform infrared spectroscopy and thermogravimetric analysis.
“…The value for S 1 , S 2 , and S 3 for A* and K* have been taken in the literature [50]. Thermogravimetric analysis (TGA) confirmed that pristine graphite was very stable and had no observable weight loss during heating to 900 • C. GO was less thermally stable than graphite, undergoing a three-step degradation process.…”
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