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A series of new Schiff base polyamides(PAs) were synthesized by polycondensation of benzilbisthiosemicarbazone diamine(LH_6) with different commercially available aliphatic and aromatic diacid chlorides. The monomer and all the PAs were characterized by FTIR,~1H-NMR,and elemental analysis.The prepared polyamides showed inherent viscosities in the range of 0.30-0.36 dL/g in DMF at 25℃,indicating their moderate molecular weight.The PAs were completely soluble in aprotic polar solvents such as dimethylformamide(DMF),N-methylpyrolidone(NMP), tetrachloroethane(TCE),dimthylsulfoxide(DMSO) and also in H_2SO_4 and partially soluble in THF,acetone and chloroform at room temperature.Thermal analysis showed that these PAs were practically amorphous and exhibited 10%weight loss above 220℃.
A series of new Schiff base polyamides (PAs) were synthesized by polycondensation of benzilbisthiosemicarbazone diamine (LH_6) with different commercially available aliphatic and aromatic diacid chlorides. The monomer and all the PAs were characterized by FTIR, ~ 1H-NMR, and elemental analysis. The prepared polyamides was inherently soluble in a polar polar solvents such as dimethylformamide (DMF), N-methylpyrolidone (NMP) , tetrachloroethane (TCE), dimthylsulfoxide (DMSO) and also in H 2 SO 4 and partially soluble in THF, acetone and chloroform at room temperature. Thermo analysis showed these PAs were practically amorphous and exhibited 10% weight loss above 220 ° C.