{'fraction_non_alphanumeric': 0.061269146608315096, 'fraction_numerical': 0.0087527352297593, 'mean_word_length': 5.019736842105263, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Characterization of Thermally Stable AB-type Poly(ether-amide)s Derived from AB-type Monomers by Fluoro Displacement Reaction

Two AB-type monomers 4-fluoro -N-(4-(2-(4-hydroxyphenyl) propan-2-yl) phenyl) benzamide and 4-fluoro -N-(5-hydroxy naphthyl) benzamide were synthesized. The AB-type poly(ether-amide)s (PEAs) were derived by self-polymerization via the nucleophilic aromatic displacement reaction of AB-type monomers. The structure of AB-type monomers and PEAs were confirmed by FT-IR and H1-NMR spectroscopy. The PEAs were characterized by TGA, DSC, XRD, solution viscosity and solubility. X-ray diffraction studies indicated that the poly (ether-amide)s were amorphous. Poly(ether-amide)s exhibited excellent thermal stability and solubility. All the PEAs were readily soluble at room temperature in polar aprotic solvent DMSO, NMP and DMAc and also in less polar solvents such as m-cresol and pyridine.