title: Microwave initiated synthesis of polymethylmethacrylate grafted guar (GG-g-PMMA), characterizations and applications.
abstract: Guar gum was grafted with polymethylmethacrylate (PMMA) by microwave initiated method. The synthesis was optimized for highest percentage grafting, by varying the microwave irradiation time and monomer (methyl methacrylate) concentration. The various grades of grafted product (GG-g-PMMA) were characterized through standard physicochemical characterization techniques (intrinsic viscosity measurement, elemental analysis, FTIR spectroscopy & SEM morphology study). Further, flocculation efficacy of this grafted polysaccharide was studied by standard 'Jar test' procedure in 0.5% kaolin suspension, to assess its application as flocculating agent for wastewater treatment and mineral ore beneficiation. Correlation between percentage grafting and intrinsic viscosity was also studied for the possibility of using it as a tool to control the intrinsic viscosity in the final product. This leads to the possibility of application of the grafted product as superior viscosifier than guar gum.
authors.affiliation: Department of Applied Chemistry, Birla Institute of Technology, Mesra, Ranchi 835 215, Jharkhand, India.
authors.forename: Sumit
authors.initials: S
authors.lastname: Mishra
authors.forename: Gautam
authors.initials: G
authors.lastname: Sen
mesh_terms: D005428:Flocculation Tests; D005685:Galactans / Q000737:chemistry*; D008351:Mannans / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D008872:Microwaves; D015394:Molecular Structure; D053149:Plant Gums / Q000737:chemistry*; D011108:Polymers / Q000138:chemical synthesis*; D019904:Polymethyl Methacrylate / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D014783:Viscosity; D014865:Waste Disposal, Fluid / Q000379:methods
chemical_list: D005685:Galactans; D008351:Mannans; D053149:Plant Gums; D011108:Polymers; D019904:Polymethyl Methacrylate; C007894:guar gum