Synthesis and characterization of a biphenyl perfluorocyclobutyl (BP‐PFCB) polyethylene glycol (PEG) blend compatibilizer |
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| Authors: | Dakarai K Brown Scott T Iacono Jean‐Marc Cracowski Kenneth Christensen Dennis W Smith Jr |
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| Institution: | 1. Department of Chemistry and Center for Optical Materials Science and Engineering Technologies (COMSET), Clemson University, Clemson, SC, USA;2. Department of Chemistry and Chemistry Research Center, United States Air Force Academy, Colorado Springs, CO, USA;3. Department of Chemistry and The Alan G. MacDiramid NanoTech Institute, The University of Texas at Dallas, Richardson, TX, USA |
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| Abstract: | Polyethylene glycol (PEG) end‐capped trifluorovinyl ether (TFVE) telechelomer was synthesized in one step via esterification of 4‐(trifluorovinyloxy) benzoic acid. The new telechelomer was characterized by attenuated total reflectance Fourier transform infrared (ATR‐FTIR), elemental analysis, and by 19F and 1H nuclear magnetic resonance (NMR) spectroscopy. The telechelomer and 4,4′‐bis(4‐trifluorovinyloxy)biphenyl (BPVE) were thermally copolymerized via step‐growth 2 + 2] cycloaddition at 160°C. The polymerization afforded PEG enchained biphenyl perfluorocyclobutyl (BP‐PFCB) copolymers that are solution processable and film forming. These copolymers were characterized by ATR‐FTIR, 19F NMR, and 1H NMR. Gel permeation chromatography (GPC) gave number‐average molecular weight (Mn) ranging 11,000 to 12,000. Compatibilization of PEG and a commercial polymer BP‐PFCB was achieved utilizing the new PEG BP‐PFCB copolymer, 3‐co2‐4 . It was found that 5 wt% of 3 ‐ co2 ‐ 4 was ideal to reduce interfacial tension by scanning electron microscope (SEM). In addition, phase homogeneity was studied by differential scanning calorimetry (DSC). Copyright © 2016 John Wiley & Sons, Ltd. |
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| Keywords: | semifluorinated polyaryl ethers PFCB aryl ethers PFCB aryl ethers blends PEG |
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