Synthesis and characterization of a biphenyl perfluorocyclobutyl (BP‐PFCB) polyethylene glycol (PEG) blend compatibilizer
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 28, 2016
- Source ID
- 10.1002/pat.3808
Entities
People
- Dakarai K. Brown
- Dennis W. Smith Jr.
- Jean‐marc Cracowski
- Kenneth A Christensen
- Scott T Iacono
Organizations
- Clemson University
- Defense Advanced Research Projects Agency
- Defense Threat Reduction Agency
- United States Air Force Academy
- University of Texas at Dallas