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

• Published in: Journal of applied polymer science Vol. 132; no. 16; pp. np - n/a
• Main Authors: Brown, Dakarai K., Cracowski, Jean-Marc, Iacono, Scott T., Christensen, Kenneth, Smith Jr, Dennis W.
• Format: Journal Article
• Language: English
• Published: Hoboken Blackwell Publishing Ltd 20.04.2015; Wiley Subscription Services, Inc
• Subjects: addition polymerization; Crystallites; Degradation; Differential scanning calorimetry; differential scanning calorimetry (DSC); elastomers; Ethers; Materials science; Nuclear magnetic resonance; Polymers; Reflectance; Tapping; Thermal properties; thermogravimetric analysis (TGA)
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.41798

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′‐bis(4‐trifluorovinyloxy)biphenyl. These new thermoplastics were characterized by 1H and F19 nuclear magnetic resonance (NMR) and attenuated total reflectance Fourier transform infrared (ATR‐FTIR). Gel permeation chromatography (GPC) analysis displayed number average molecular weights (Mns) 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 (Tgs) 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. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41798.