Chien-hui Li, A-Ra Jung, A. Liang
Jun 20, 1995
Citations
0
Influential Citations
18
Citations
Journal
Journal of Applied Polymer Science
Abstract
Three series of copoly(amide–ester–imide)s were prepared from amino acid (4-aminobenzoic acid, 3-aminobenzoic acid, or 6-aminohexanoic acid) and N-(4-hydroxyphenyl)phthalimide-4-carboxylic acid (M1), N-(3-hydroxyphenyl)phthalimide-4-carboxylic acid (M2), or N-(2-methyl-4-hydroxyphenyl)phthalimide-4-carboxylic acid (M3) in the presence of diphenylchlorophosphate (DPCP) and pyridine as direct condensation agents. The inherent viscosities of copoly(amide–ester–imide)s were in the range of 0.13–0.95 dL/g. Thermotropic liquid crystalline (LC) behavior of these polymers was examined by differential scanning calorimetry (DSC) and optical polarizing microscopy. These copoly(amide–ester–imide)s (IIa, IIe, IIIa, and IIIc) polymerized from 3-aminobenzoic acid or 6-aminohexanoic acid with M1 or M3, respectively, showed thermotropic liquid crystalline behavior in the range of 190–426°C. © 1995 John Wiley & Sons, Inc.