Macromolecular Research

The Polymer Society of Korea (한국고분자학회)
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Using Microwave Irradiation to Prepare New Poly(amide-imide)s Containing Tetrahydropyrimidinone, Tetrahydro-2-thioxopyrimidine, and Trimellitic Rings in Their Main Chains: Synthesis and Characterization

  • Faghihi Khalil (Organic Polymer Chemistry Research Laboratory, Department of Chemistry, Faculty of Science, Arak University, Dept. of Chemical Eng., Faculty of Eng., Azad University of Arak) ;
  • Hagibeygi Mohsen (Dept. of Chemical Eng., Faculty of Eng., Azad University of Arak)
  • Published : 2005.02.01
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Abstract

Under irradiation in a microwave oven, six novel poly(amide-imide)s containing tetrahydropyrimidinone, tetrahydro-2-thioxopyrimidine moieties and trimellitic rings in their main chains were synthesized through the polycondensation reaction of N,N'-(4,4'-diphenylether)bis(trimellitimide) diacid chloride with six different derivatives of tetrahydropyrimidinone and tetrahydro-2-thioxopyrimidine in the presence of a small amount of a polar organic medium, such as o-cresol. The polycondensation proceeded rapidly and completed within 7-9 min, producing a series of new poly(amide-imide)s in high yield that showed inherent viscosities in the range 0.33-0.52 dL/g. These poly(amide-imide)s were characterized by elemental analysis, viscosity measurement, thermal gravimetric analysis, solubility test, and FT-IR spectroscopy. All of the polymers were soluble at room temperature in polar solvents such as N,N-dimethylacetamide, N,N-dimethylformamide, dimethylsulfoxide, tetrahydrofuran, and N-methyl-2-pyrrolidone.

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