Citation: Khalil Faghihi. New optically active poly(amide-imide)s derived from N,N'-(4,4-diphthaloyl)-bis-L-leucine and hydantoin derivatives:Synthesis and properties[J]. Chinese Chemical Letters, ;2009, 20(10): 1153-1156. doi: 10.1016/j.cclet.2009.06.001 shu

New optically active poly(amide-imide)s derived from N,N'-(4,4-diphthaloyl)-bis-L-leucine and hydantoin derivatives:Synthesis and properties

Khalil Faghihi

Polymer Chemistry Research Laboratory, Department of Chemistry, Faculty of Science, Islamic Azad University, Arak Branch, Arak, Iran

Received Date: 16 February 2009

Six new optically active poly(amide-imide)s (5a-f) were synthesized through the direct polycondensation reaction of N,N'-(4,4'-diphthaloyl)-bis-L-leucine (3) with six hydantoin derivatives (4a-f).Triphenyl phosphite (TPP)/pyridine in the presence of calcium chloride (CaCl ₂) and N-methyl-2-pyrrolidone (NMP) were successfully applied for direct polycondensation.The polycondensation reactions produce a series of new poly(amide-imide)s (5a-f) in high yields, and inherent viscosity between 0.42 and 0.55 dL/g.The resulting poly(amide-imide)s (5a-f) were characterized by elemental analysis, viscosity measurements, thermal gravimetric analysis (TGA and DTG), solubility test and FT-IR spectroscopy.
- High performance polymers,
- Poly(amide-imide)s,
- Direct polycondensation,
- Hydantoin derivatives
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