Pressure Induced Graft Copolymerization of Binary Vinyl Monomer Mixtures onto Saccharum Cilliare Fiber and Evaluation of Some Physical,Chemical and Thermal Properties

摘要

Modification of Saccharum cilliare fiber has been carried out by graft copolymerization of different binary monomer mixtures:Methyl methacrylate(MMA)/Acrylonitrile(AN);MM A/Methyl acrylate(MA);MMA/Acrylic acid(AA);and MMA/Acrylamide(AAm)under optimum pressure(1.5 Kg/cm2)using potassium persulfate-ferrous ammonium sulfate(FAS-KPS)as redox initiator.Initially optimum reaction conditions were worked out for graft copolymerization of MMA onto S.cilliare fiber for getting maximum graft yield.This was followed by graft copolymerization of binary monomer mixtures onto fiber under optimum reaction conditions by varying the concentration of binary component of vinyl monomer(AN,MA,AA and AAm)with optimum concentration of MM A to get maximum graft yield.The graft copolymers thus prepared were subjected to evaluation of their physico-chemical and thermal properties.Characterization of the graft copolymers has been done by Fourier Transform Infrared(FTIR)spectroscopy,Thermo-gravimetric analysis'(TGA)/Differential Thermal Analysis(DTA)and Scanning Electron Microscopy(SEM).