In this work, the monomer N, N′-bis(4-fluorobenzamide)dicyclohexyl methane (BFDCM) was synthesized successfully by 4-fluorobenzoylchloride and 4,4′-diaminodicyclohexylmethane through interfacial reaction, and then the monomer BFDCM and 1,4-benzenediol (HQ) or 4.4′-biphenol (BH) were used to prepare the novel poly(arylene ether amide) (HQ-BFDCM and BH-BFDCM) containing an aliphatic ring in the main chain by nucleophilic substitution in NMP solution. These two polymers exhibited the inherent viscosities ranging from 0.828 to 1.044 dL g−1, high glass-transition temperatures (Tg) of 214.1–235.0 °C, and weight-loss temperature (T5%) of 425.2–441.3 °C. The polymers HQ-BFDCM and BH-BFDCM could completely or partly dissolve in some polar solutions, such as NMP, DMF, and so on, and they showed moderate corrosion resistance. Additionally, the obtained polymers HQ-BFDCM and BH-BFDCM exhibited good optical property, and the optical transmittances of HQ-BFDCM and BH-BFDCM were 74% and 80% at 450 nm, respectively, which showed that they could be applied to the heat-resistant optical films.

In this work, a series of semi‐crystalline semi‐aromatic poly (ether amides) (PAT‐2–PAT‐10) with varying length of polymethylene moiety (2, 4, 6, 8 or 10 methyl groups) and number of ether groups in the main chain were synthesized by the nucleophilic substitution reaction of semi‐aromatic difluorobenzamido alkanes with 1, 4‐benzenediol at about 190–200°C, using K2CO3 as catalyst, N‐methyl pyrrolidione (NMP) as reaction solvent. And their viscosities, thermal, and mechanical properties were investigated. The inherent viscosities, glass transition, melting and degradation temperatures and tensile strength values of the synthesized polymers were in the range 0.141–1.829 dL g−1, 119.1–165.0°C, 272.4–345.4°C, and 371.4–451.1°C, and 61.2–79.2 MPa respectively. Moreover, they were found to have good solubility in concentrated sulfuric acid and trifluoroacetic acid at room temperature. The length of poly methylene group and ether bond in the polymer main chain had significantly influenced their thermo mechanical properties. The polyamides PAT‐6–PAT‐10 had better thermo mechanical property than that of commercial polyamide, PA6T/66.