Summary
In this research work, 4,4’-oxydiphthalic anhydride (1) was reacted with L-phenylalanine (2) in acetic acid and the resulting imide-acid 3 was obtained in high yield. This imide-acid 3 was converted to diacid chloride 4 by reaction with thionyl chloride. The polycondensation reaction of diacid chloride 4 with several aromatic diamines such as 4,4’-sulfonyldianiline (5a), 4,4’-diaminodiphenyl methane (5b), 4,4’-diaminodiphenylether (5c), p-phenylenediamine (5d), m-phenylenediamine (5e), and 4,4’-diaminobiphenyl (5f) was performed by two conventional methods: low temperature solution polycondensation and short period reflux conditions. Several new thermally stable optically active poly(amide-imide)s with inherent viscosity ranging from 0.34–0.62 dL/g were obtained with high yield. All of the above polymers were fully characterized by 1H-NMR, FT-IR, elemental analyses and specific rotation techniques. Some structural characterizations and physical properties of this new optically active poly (amide-imide)s are reported.
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Mallakpour, S., Kowsari, E. Synthesis and Properties of Novel Soluble and Thermally Stable Optically Active Poly(amide-imide)s from N,N’-(4,4’-Oxydiphthaloyl)-bis-L-phenylalanine Diacid Chloride and Aromatic Diamines. Polym. Bull. 54, 147–155 (2005). https://doi.org/10.1007/s00289-005-0374-5
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DOI: https://doi.org/10.1007/s00289-005-0374-5