N‐Trimellitylimido‐L‐phenylalanine was prepared from the reaction of 1,2,4‐benzenetricarboxylic anhydride with L‐phenylalanine in N,N‐dimethylformamide solution at refluxing temperature. The direct polycondensation reaction of the monomer imide‐diacid with 4,4′‐diaminodiphenylsulfone, 4,4′‐diaminodiphenylmethane, 1,4‐phenylenediamine, 1,3‐phenylenediamine, 2,4‐diaminotoluene, 4,4′‐diaminodiphenylether and benzidine was carried out in a medium consisting of triphenyl phosphite, N‐methyl‐2‐pyrrolidone, pyridine and calcium chloride. The resulting poly(amide–imide)s, PAIs, having inherent viscosities of 0.21–0.45 dlg−1 were obtained in high yield. All of the above compounds were fully characterized by IR spectroscopy and elemental analyses. The optical rotation of all PAIs has also been measured. Some structural characterization and physical properties of these new optically active PAIs are reported. © 2001 Society of Chemical Industry

N-Trimellitylimido-DL and L-alanine (3) were prepared from the reaction of trimellitic anhydride (1) with DL and L-alanine (2) in N,N-dimethyl formamide (DMF) solution at refluxing temperature. The direct polycondensation reaction of the monomers imide-diacid (3) with 4,4Ј-diaminodiphenylsulfone (4a), 4,4Ј-diaminodiphenylmethane (4b), 1,4-phenylenediamine (4c), 1,3-phenylenediamine (4d), 2,4-diaminotoluene (4e), and 4,4Ј-diaminodiphenylether (4f) was carried out in a medium consisting of triphenyl phosphite, N-methyl-2-pyrolidone (NMP), pyridine, and calcium chloride. The resulting poly(amide-imide)s PAIs, with inherent viscosities 0.32-0.66 dL/g, were obtained in high yield. All of the above-mentioned compounds were fully characterized by IR, elemental analyses, and specific rotation. Some structural characterization and physical properties of these new optically active PAIs are reported.

Pyromellitic dianhydride (benzene‐1,2,4,5‐tetracarboxylic dianhydride) (1) was reacted with L‐phenylalanine (2) in a mixture of acetic acid and pyridine (3 : 2) and the resulting imide‐acid [N,N′‐(pyromellitoyl)‐bis‐L‐phenylalanine diacid] (4) was obtained in quantitative yield. The compound (4) was converted to the N,N′‐(pyromellitoyl)‐bis‐L‐phenylalanine diacid chloride (5) by reaction with thionyl chloride. A new facile and rapid polycondensation reaction of this diacid chloride (5) with several aromatic diols such as phenol phthalein (6a), bisphenol‐A (6b), 4,4′‐hydroquinone (6c), 1,8‐dihydroxyanthraquinone (6d), 4,4‐dihydroxy biphenyl (6e), and 2,4‐dihydroxyacetophenone (6f) was developed by using a domestic microwave oven in the presence of a small amount of a polar organic medium such as o‐cresol. The polymerization reactions proceeded rapidly and are completed within 20 min, producing a series of optically active poly(ester‐imide)s with good yield and moderate inherent viscosity of 0.10–0.26 dL/g. All of the above polymers were fully characterized by IR, elemental analyses, and specific rotation. Some structural characterization and physical properties of these optically active poly(ester‐imide)s are reported. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 2211–2216, 2002

Poly acrylic acid (PAA) was grafted with pt-butyl calix[4]arene diamine (distal cone) (2) to adsorb toxic heavy metal and alkali metal cations. The grafting method includes the amidation reaction of PAA with calixarene diamine derivative 2 which was carried out in N,N-dimethylformamide (DMF) and N-methyl-2-pyrrolidone (NMP) as solvents. The modified PAAs (PAA-C1 and PAA-C2) were characterized by FTIR, 1 H-NMR, thermal gravimetric analysis (TGA) and differential scanning calorimetry (DSC). PAA-C1 and PAA-C2 were used to evaluate the sorption properties of some toxic heavy metal cations (Co 2þ , Cu 2þ , Cd 2þ , Hg 2þ ), alkali metal cations (Na þ , K þ , Cs þ ), and Ag þ . Results showed that the modified PAAs were good sorbents for heavy metal and alkali metal cations. The main goal of this project is to design hydrophobically modified PAA that is suitable for ion selective membranes and chemical sensor devices for adsorption of toxic heavy metals. V C 2010 Wiley Periodicals, Inc. J Appl Polym Sci 118: 818-826, 2010

No abstract