Macromolecular Research

The Polymer Society of Korea (한국고분자학회)
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Synthesis and Properties of Novel Flame-Retardant and Thermally Stable Poly(amideimide)s from N,N'-(bicyclo[2,2,2]oct-7-ene-tetracarboxylic)-bis-L-amino Acids and Phosphine Oxide Moiety by Two Different Methods

  • Faghihi, Khalil (Organic Polymer Chemistry Research Laboratory, Department of Chemistry, Faculty of Science, Arak University) ;
  • Hajibeygi, Mohsen (Organic Polymer Chemistry Research Laboratory, Department of Chemistry, Faculty of Science, Arak University) ;
  • Shabanian, Meisam (Organic Polymer Chemistry Research Laboratory, Department of Chemistry, Faculty of Science, Arak University)
  • Published : 2009.10.25
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Abstract

N,N'-(bicyclo[2,2,2]oct-7-ene-tetracarboxylic)-bis-L-amino acids 3a-g were synthesized by the condensation reaction of bicyclo[2,2,2]oct-7-ene-2,3,5,6-tetracarboxylic dianhydride 1 with two equimolars of Lalanine 2a, L-valine 2b, L-leucine 2c, L-isoleucine 2d, L-phenyl alanine 2e, L-2-aminobutyric acid 2f and L-histidine 2g in an acetic acid solution. Seven new poly(amide-imide)s PAIs 5a-g were synthesized through the direct polycondensation reaction of seven chiral N,N'-(bicyclo[2,2,2]oct-7-ene-tetracarboxylic)-bis-L-amino acids 3a-g with bis(3-amino phenyl) phenyl phosphine oxide 4 by two different methods: direct polycondensation in a medium consisting of N-methyl-2-pyrrolidone (NMP)/triphenyl phosphite (TPP)/calcium chloride ($CaCl_2$/pyridine (py), and direct polycondensation in a tosyl chloride (TsCl)/pyridine (py)/N,N-dimethylformamide (DMF) system. The polymerization reaction produced a series of flame-retardant and thermally stable poly(amide-imide)s 5a-g with high yield. The resulted polymers were fully characterized by FTIR, $^1H$ NMR spectroscopy, elemental analyses, inherent viscosity, specific rotation and solubility tests. Data obtained by thermal analysis (TGA and DTG) revealed that the good thermal stability of these polymers. These polymers can be potentially utilized in flame retardant thermoplastic materials.

Keywords

References

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