Poly(pentafluorostyrene), high heat & chemical resistance, low refractive index & dielectric constant
For applications in the field of optoelectronics such as a cladding layer in optical waveguide, and design of polylectrolytic membranes for fuel cells
Poly(pentafluorostyrene) (PPFS) is a highly fluorinated homopolymer of pentafluorostyrene monomer via free radical polymerisation. Due to its high ratio of fluoro content in the polymer, poly(pentafluorostyrene) offer great thermal stability with high heat and high chemical resistance, as well as oil and water repellence.
Poly(pentafluorostyrene) also exhibits low refractive index and low dielectric constant which has potential application in microelectronics or as an antifouling and antifogging agent, and as cladding layer in optical waveguide.
Fluoro at 4-positon offers great chemistry for post-modification by aromatic nucleophilic substitution reaction. It can be substituted by sulfur or phosphorus functional groups for further applications as membranes in fuel cells and redox follow battery. Starting with poly(pentafluorostyrene),100% sulfonation can be achieved by thiolation with metal sulfide and then oxidation of the thiol-functions to the corresponding sulfonic acids. Sulfonated poly(pentafluorostyrene) shows great improvement of the proton-conductivity being 35 mS cm-1 (at 160 °C, p = 105 Pa water vapor pressure), an order of magnitude higher than those of Nafion measured under the same conditions.
Poly(2,3,5,6-tetrafluorostyrene-4-phosphonic acid), can also be directly synthesised by using poly(pentafluorostyrene) as one of the starting materials that does not require anhydride formation and thus maintains protonic conductivity above 200 °C. The use of the phosphonated poly(pentafluorostyrene) in fuel cell electrodes with an ion-pair coordinated membrane outperforming polybenzimidazole- and metal phosphate-based fuel cells with peak power densities of 1,130 mW cm-2 at 160 °C and 1,740 mW cm-2 at 240 °C under H2/O2 conditions.
|Solubility||Acetone, MEK, NEP, THF|
|Melting Point||Tg = 80 °C|
|Synonyms||PPFS, 2,3,4,5,6-Pentafluorostyrene homopolymer, Poly[(pentafluorophenyl)ethylene]|
|Classification / Family||Polystyrenes, Fluorinated polymers, Photonic and optical materials|
MSDS DocumentationPoly(pentafluorostyrene) MSDS Sheet
Literature and Reviews
Sulfonated poly(pentafluorostyrene): Synthesis & characterization, V. Atanasov et al., Solid State Ion., 252 (1), 75-83 (2013); DOI: 10.1016/j.ssi.2013.06.010.
- Synergistically integrated phosphonated poly(pentafluorostyrene) for fuel cells, V. Atanasov et al., Nat. Mater., 20, pages 370–377 (2021); DOI: 10.1038/s41563-020-00841-z.
- Covalent immobilization of luminescent oxygen indicators reduces cytotoxicity, H. Välimäki et al., Biomed Microdevices 22, 41 (2020); DOI: 10.1007/s10544-020-00495-3.
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