Synthesis, Characterization and Material Application of Novel Polyimide

Abstract Novel polyimide-II containing 8-hydroxyquinoline as pendent groups was prepared by reacting N,N′-(1,1′-biphenyl)-4,4′-diyl bismaleimide--diamine polyimide-I (BPBMDDM) with 5-chloromethyl-8-hydroxyquinoline hydrochloride (CMHQ) in the presence of base catalyst. N,N′-(1,1′-biphenyl)-4,4′-diyl bismaleimide--diamine polyimide-I (BPBMDDM) was prepared by Michael addition reaction of N,N′-(1,1′-biphenyl)-4,4′-diyl bismaleimide (BPBM) with 4,4′-diaminodiphenyl methane (DDM). The resulting polyimide-II (BPBMDDMCMHQ) was characterized by spectral techniques. Polymeric metal chelates of polyimide-II were prepared using the transition metal ions Zn(II), Cu(II), Ni(II), Co(II), and Mn(II), and were characterized. Ion-exchange properties of polyimide-II (BPBMDDMCMHQ) for Fe(III), Zn(II), Ni(II) and Cu(II) metal ions were also studied by batch-equilibration method. The polyimide-II (BPBMDDMCMHQ) has good metal uptake capacity at varying pH range and can be recycled. It has thermal stability up to 240°C. Keywords: batch-equilibration methodion-exchange propertiesMichael addition reactionpolyimidepolymeric chelatesthermogravimetric analysis The author is thankful to University Grants Commission, Pune, for providing financial assistance. The author is also thankful to Principal Dr. D. J. Desai, V. P. & R. P. T. P. Science College, Vallabh Vidyanagar, for providing the necessary research facilities. Notes L = Polyimide-II (BPBMDDMCMHQ), = DP×(Molecular weight of repeating unit). D = diamagnetic in nature. L = Polyimide-II (BPBMDDMCMHQ). Time: 24 h at room temperature. a Volume of electrolyte solution taken = 25 ml, Volume of metal-ion solution taken is 1 ml. b Weight of Polyimide-II (BPBMDDMCMHQ) taken is 25 ± 0.010 mg. a Metal nitrate (0.1 mol/ltr), Volume = 1 ml NaNO3 mol/ltr, Volume 25 ml at room temperature, Weight of Polyimide-II = 24.91 mg. b Related to the amount of metal ions taken up at the state of equilibrium assumed to be established in 24 h at 100%. a 0.1 mole/ltr Metal nitrate, Volume = 1 ml. Weight of Polyimide-II = 25 mg. 1 mole/ltr NaNO3, Volume = 25 ml, at room temperature, Time 24 h (equilibrium state). b Possibility of error ±5%.