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This study presents synthesis of new polythioamides prepared from dialdehyde, [4,4′-methylene bis(cinnamaldehyde)] (MBC) with ethylenediamine, 1,3-propylenediamine, semicarbazide, thiosemicarbazide and meso-stilbenediamine, in the presence of elemental sulfur by Willgeordt Kindler reaction. Elemental microanalysis, FTIR, UV-visible and NMR spectroscopic techniques were used to characterize synthesized polythioamides. Viscometric data of polymeric solutions were obtained by using Huggins, Kramer, Martin and Schulz-Blaschke equations in THF at 303 K, by graphic extrapolation and Solomon-Ciuta, Deb-Chantterjee equations through a single point determination, which represents the benefit of being a faster method. [ABSTRACT FROM AUTHOR]

The synthesis of a new polymeric resin [poly 4,4'-(naphthyl bis(oxy))bisbenzaldehyde ethylenediimine] (PNBOBen) by polymerization from dialdehyde 4,4'-naphthylbis(oxy) bisbenzaldehyde with ethylenediamine in m-cresol is described The synthesized Schiff base polymer (PNBOBen) was characterized by elemental microanalysis, FT-IR and 1H-NMR spectroscopy. The thermal degradation pattern of PNBOBen resin was also measured at higher temperature. The dialdehyde (NBOB) and Schiff base polymer (PNBOBen) were soluble in various common organic solvents including tetrahydrofuran (THF), dimethylformamide (DMF), dimethylacetamide (DMAc) and dimethylsulphoxide (DMSO). The metal uptake behavior of PNBOBen was investigated for Cu (II) and Ni (II) ions and optimized with respect to the sorptive medium (pH), shaking rate and equilibration time. The resin exhibited lower swelling ratios in an acidic medium because of the protonation in the imine group of polymer. The sorption of Cu (II) and Ni (II) by PNBOBen, followed Langmuir, Freundlich, and Dubinin-Radushkevich (D-R) isotherms. Thus in both metal ions, Cu (II) was sorbed slightly better than Ni (II) ions onto the polymeric resin (PNBOBen). [ABSTRACT FROM AUTHOR]