Synthesis and Characterization of Thianthrene-Based Polyamides
Document Type
Article
Publication Date
1-2-1995
Department
Polymers and High Performance Materials
Abstract
Thianthrene-2,7- and -2,8-dicarboxylic acids plus a synthetic intermediate, 4,4'-thiobis[3-chlorobenzoic acid], have been synthesized in good yields via nucleophilic aromatic substitution of Na2S on N,N-dimethyl-3,4-dichlorobenzamide. New aromatic polyamides having inherent viscosities of 1.29-2.39 dL/g were prepared by the direct polycondensation reaction of the dicarboxylic acids with 4,4'-oxydianiline and 1,4-phenylenediamine in N-methyl-2-pyrrolidinone (NMP) using triphenyl phosphite (TPP) and pyridine. The fused-ring thianthrene-based polyamides were more soluble than analogous poly(thioether amide)s. Polymer films were cast from either N,N-dimethylformamide (DMF) or N,N-dimethylacetamide (DMAc)/LiCl solutions and analyzed by FTIR and NMR. All prepared aramids displayed good thermal stability by DSC and TGA.
Publication Title
Macromolecules
Volume
28
Issue
1
First Page
79
Last Page
85
Recommended Citation
Johnson, R. A.,
Mathias, L. J.
(1995). Synthesis and Characterization of Thianthrene-Based Polyamides. Macromolecules, 28(1), 79-85.
Available at: https://aquila.usm.edu/fac_pubs/5777