Effect of graft copolymerization of fir sawdust lignocellulose with N-vinylpyrrolidone on adsorption capacity to tea catechins

Synthesis and characterization of graft copolymers of N-Vinyl-2-Pyrrolidone onto guar gum for sorption of Fe2+ and Cr6+ ions

“…Among the methods of modification of polymers, grafting is one of the promising methods to impart a variety of functional groups to a polymer. Literature survey reveals that recently a good amount of work has been carried out on grafting of various vinyl monomers onto various backbone polymers using different initiating systems (Al-Karawi, Ai-Qaisi, Abdullah, Al-Mokaram, & Al-Heetimi, 2011;Carreira, Gonç alves, Mendonç a, Gil, & Coelho, 2010;Kumar, Singh, & Ahuja, 2009;Saboktakin, Maharramov, & Ramazanov, 2009;Sand, Yadav, & Behari, 2010;Sharma & Mishra, 2010;Singh, Chauhan, Kumar, & Chauhan, 2007;Singha & Rana, 2010;Ye et al, 2010;Zhang et al, 2009). Guar gum is a high molecular weight hydrocolloidal hetero-polysaccharide composed of galactan and mannan units.…”

Studies on Graft Copolymerization of 2-Hydroxyethylmethacrylate Onto Kappa-Carrageenan Initiated by Ceric Ammonium Nitrate

“…Graft copolymers are prepared by first generating free radicals on the polysaccharide backbone and then allowing these radicals to serve as macroinitiators for the vinyl monomers. These biodegradable and low cost graft copolymers, with new properties can be used in many applications such as textiles, paper industry, agriculture, medical treatment, in petroleum industry as flocculants and thickening agents 2,3 and also development of selective permeable membranes, 8 sorption agents, 9 and in fabrication of drug delivery systems.…”

Optimization Effective Parameters on Gamma Radiation Polymerization Copolymer based on Collagen

“…grafting rati (Gr%), add-on value (Ad%), and homopolymer content (Hp%), used to characterize the nature of the copolymer are defined and calculated using the following equations [14][15][16][17] where W 0 , W 1 , and W 2 are the weight of the initial substrate, total product (copolymer and homopolymer), and pure graft copolymer (after DMF extraction), respectively.…”