Preparation of segmented semifluorinated poly(aryl ether)s from aromatic trifluorovinyl ethers and oligo(ethylene glycol)s

Abstract

A series of new segmented semifluorinated polyaryl ethers (PAEs) containing a biphenyl segmented by semifluorinated oligoethylene (SFE) units were prepared by nucleophilic addition of a commercial oligo(ethylene glycol)s to 4,4 0 -bis(4-trifluorovinyloxy)biphenyl. These new thermoplastics were characterized by 1 H and F 19 nuclear magnetic resonance (NMR) and attenuated total reflectance Fourier transform infrared (ATR-FTIR). Gel permeation chromatography (GPC) analysis displayed number average molecular weights (M n s) from 9000 to 13,000. Thermal properties of the polymers were studied by differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA). DSC chromatograms displayed glass transition temperatures (T g s) from 11 to 1 C. The onsets of degradations were observed by TGA analysis between 313 to 333 C in air and 326 to 363 C in nitrogen, respectively. A second onset of degradation was observed from 452 to 470 C for all polymers. In addition, crystalline morphologies were studied by tapping mode atomic force microscopy (TM-AFM) and showed needle-like crystallites.

Design and synthesis of low‐dieclectric polyaryl ethers containing bulky tetraphenyl vinyl pendant group

“…As a result, they find wide-ranging applications in medical devices, aviation automobiles, electronic, and electrical application and other fields. [22][23][24][25] The introduction of a large nonplanar side groups on the polymer backbone can increase the distance between the molecular chain and destroy the symmetry and regularity of the molecular structure. This, in turn, increases the free volume and achieve the purpose of reducing the dielectric constant.…”

“…As one of the representatives of high‐performance polymers, polyaryl ether materials have the advantages of high‐temperature resistance, acid and alkali resistance, high strength and toughness, and low water absorption etc. As a result, they find wide‐ranging applications in medical devices, aviation automobiles, electronic, and electrical application and other fields 22–25 . The introduction of a large nonplanar side groups on the polymer backbone can increase the distance between the molecular chain and destroy the symmetry and regularity of the molecular structure.…”

Synthesis and characterization of a biphenyl perfluorocyclobutyl (BP‐PFCB) polyethylene glycol (PEG) blend compatibilizer

“…[1][2][3] Semifluorinated poly aryl ethers are an emerging class of thermoplastics that maintain high thermooxidative stability while often exhibiting solution and melt processability. [4,5] Recent advancements included semifluorinated poly(aryl ether)s prepared with a quadrephenyls, [6] segmented with oligo(ethylene glycol)s, [7] perfluorocyclopentenyl, [8] and trifluoromethyl groups. [9] Perfluorocyclobutyl (PFCB) aryl ether polymers are a wellestablished class of semifluorinated poly aryl ethers that are known for high thermal stability, chemical stability, optical clarity, and solution processability.…”