The Synthesis and Characterization of Polyvinylalcohol-g-Poly(Trimethylallylammonium)

Polyvinyl alcohol graft polytrimethylallylammonium (PVA-g-PTMA) was prepared. The graft polymerization of PVA and trimethylallylammonium(TMA) was carried out using a redox system-ammonium ceric nitrate-PVA system as an initiator. The various reaction conditions were investigated at different initiator concentration and the ratio of monomer to PVA,the temperature and time of copolymerization. It is found that the graft parameters are higher,indicating that Ce4+-PVA is an efficient redox initiating system for PVA/TMA graft polymerization. The structure of PVA-g-PTMA was characterized by IR and SEM. The results indicate that the graft polymer has been largely modified in the microstructure comparing with PVA. PVA-g-PTMA is an novel polycation electrolyte with high density charge. PVA-g-PTMA and PVA graft sodium polyacrylate (PVA-g-SPAA) self-assembled into the polyion composite membrane. The permeation flux of 600 g/m2·h～1500 g/m2·h and separation factor of 1000～2500 were obtained for dehydration of 95% ethanol at 95 ℃.