TY - JOUR
T1 - New optically active poly(amide-imide)s based on N,N '-(pyromellitoyl)-bis-L-amino acid and methylene diphenyl-4,4 '-diisocyanate
T2 - Synthesis and characterization
AU - Tian, Xiaoyu
AU - Yao, Jinshui
AU - Zhang, Xian
AU - Li, Mei
AU - Liu, Weiliang
AU - Qiao, Congde
AU - Yu, Donghong
PY - 2014/4/3
Y1 - 2014/4/3
N2 - 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.
AB - 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.
KW - direct polycondensation, optically active polymers, poly(amide-imide)s, L-amino acid
U2 - 10.1080/15685551.2013.840470
DO - 10.1080/15685551.2013.840470
M3 - Journal article
SN - 1385-772X
VL - 17
SP - 201
EP - 207
JO - Designed Monomers and Polymers
JF - Designed Monomers and Polymers
IS - 3
ER -