الفهرس | Only 14 pages are availabe for public view |
Abstract The graft copolymerization of methyl methacrylate (MMA), methyl acrylate (MA) and acrylonitrile (AN) onto Whatman Filter Paper (Wfp) as pure cellulose material using Mohr’s salt/potassium persulphate (FAS-KPS), ceric ammonium nitrate / nitric acid (CAN/HNO3) and potassium permanganate / oxalic acid (KMnO4/oxalic) respectively in aqueous media under visible light was extensively investigated. The effects of various reaction parameters such as time of irradiation, as well as the contents of initiators, monomer, cellulose material etc. on the grafting percentage (GP%) and grafting efficiency (GE%) were studied. The λmax and their extinction coefficient values of the used initiators were determined. The products of polymethyl methacrylate grafted cellulose (PMMA-g-Cell), polymethyl acrylate grafted cellulose (PMA-g-Cell) and polyacrylonitrile grafted cellulose (PAN-g-Cell) were characterized using FT-IR spectroscopy and thermal analysis techniques such as TGA and DTA. Water absorption and solvent resistance of PMMA-g-Cell, PMA-g-Cell and PAN-g-Cell copolymers were examined. The mechanism of grafting was suggested. |