Synthesis and Evaluation of Physicochemical Properties of Grewia Optiva Fiber Graft Copolymers

摘要

In this manuscript, surface modification of pretreated Grewia optiva fiber was carried out by graft copolymerization of methylmethacrylate/acrylonitrile and binary monomer mixture of acrylonitrile/acrylic acid and methyl methacrylate/acrylic acid using ceric ammonium nitrate/HNO3 as an initiator system under different reaction conditions. The single and binary monomer mixture grafting has been carried out in acidic medium in order to prevent hydrolysis of cellulosic fibers. Various reaction parameters such as reaction time, temperature, initiator concentration and monomer concentration have been optimized in order to get maximum percent grafting. The graft copolymers thus synthesized were characterized by thermal gravimetric analysis, Fourier transformer infrared spectroscopy and morphology of the grafted fiber surface was studied by scanning electron microscopy techniques. The water absorbance and chemical resistance behavior of raw and other grafted samples were also studied and were presented in a well defined and in a comparative manner.