1 Section of Chemistry, The Faculty of Engineering and Science, Aalborg University, VBN2 Supramolekular Chemistry, The Faculty of Engineering and Science, Aalborg University, VBN3 Department of Chemistry and Bioscience, The Faculty of Engineering and Science, Aalborg University, VBN4 The Faculty of Engineering and Science (ENG), Aalborg University, VBN5 School of Materials Sciences & engineering, Qilu University of Technology
Synthesis and characterization
Five new optically active poly(amide-imide)s were synthesized through the direct polycondensation reaction between chiral N,N-(pyromellitoyl)-bis-L-amino acids and methylene diphenyl-4,4-diisocyanate in a medium consisting of N-methyl-2-pyrrolidone (NMP) and xylene. The resulted polymers were fully characterized by means of Fourier transform infrared spectroscopy, elemental analyses, and solubility tests. Thermal properties of these polymers were investigated by using thermal gravimetric analysis/SDTA. All of the polymers were soluble at room temperature in polar solvents such as N,N-dimethyl acetamide, N,N-dimethyl formamide, dimethyl sulfoxide (DMSO), NMP, sulfuric acid, and para-methyl phenol. Same specific rotations of these polymers in these different solvents were obtained.
Designed Monomers and Polymers, 2014, Vol 17, Issue 3, p. 201-207
direct polycondensation, optically active polymers, poly(amide-imide)s, L-amino acid