Novel highly fluorinated perfluorocyclobutane-based phosphazene polymers for photonic applications

Song Yun Cho, Harry R. Allcock

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

Novel cyclophosphazenes containing aryl trifluorovinyl ether functional units together with the corresponding perfluorocyclobutane (PFCB) phosphazene polymers have been synthesized and characterized. These polymers have desirable properties for low optical loss waveguide applications. The monomers used in this study were prepared from sodium 4-(trifluorovinyloxy)phenoxides and cyclophosphazenes with fluorinated alkoxy or aryloxy side groups. The resulting polymers, produced by 2π + 2π cyclopolymerization of the aromatic trifluorovinyl ether moieties, showed good chemical stabilities and high thermal stabilities (T d up to 330°C). Tough and transparent thin films of these polymers were readily prepared by solvent-free processes using spin-coating of the monomers. By adjusting the ratio of monomers, the refractive index of the polymers could be controlled from 1.4528 to 1.5187 at 1550 nm, with exceptionally low birefringence of An = 0 to 0.0003 ± 0.0002. A propagation optical loss lower than ∼0.25 dB/cm at 1550 nm was determined from the polymer films, for the TE polarization by measuring the scattered light intensity along the slab waveguide length. Such good thermal and optical properties demonstrate that these novel PFCB-based phosphazene polymers are promising candidates for optical waveguide or optical device materials.

Original languageEnglish (US)
Pages (from-to)6338-6344
Number of pages7
JournalChemistry of Materials
Volume19
Issue number25
DOIs
StatePublished - Dec 11 2007

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Photonics
Polymers
Optical losses
Monomers
Ether
Ethers
Waveguides
Chemical stability
Spin coating
Optical waveguides
Optical devices
Birefringence
Polymer films
perfluorocyclobutane
Refractive index
Thermodynamic stability
Thermodynamic properties
Optical properties
Sodium
Polarization

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

Cite this

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abstract = "Novel cyclophosphazenes containing aryl trifluorovinyl ether functional units together with the corresponding perfluorocyclobutane (PFCB) phosphazene polymers have been synthesized and characterized. These polymers have desirable properties for low optical loss waveguide applications. The monomers used in this study were prepared from sodium 4-(trifluorovinyloxy)phenoxides and cyclophosphazenes with fluorinated alkoxy or aryloxy side groups. The resulting polymers, produced by 2π + 2π cyclopolymerization of the aromatic trifluorovinyl ether moieties, showed good chemical stabilities and high thermal stabilities (T d up to 330°C). Tough and transparent thin films of these polymers were readily prepared by solvent-free processes using spin-coating of the monomers. By adjusting the ratio of monomers, the refractive index of the polymers could be controlled from 1.4528 to 1.5187 at 1550 nm, with exceptionally low birefringence of An = 0 to 0.0003 ± 0.0002. A propagation optical loss lower than ∼0.25 dB/cm at 1550 nm was determined from the polymer films, for the TE polarization by measuring the scattered light intensity along the slab waveguide length. Such good thermal and optical properties demonstrate that these novel PFCB-based phosphazene polymers are promising candidates for optical waveguide or optical device materials.",
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Novel highly fluorinated perfluorocyclobutane-based phosphazene polymers for photonic applications. / Cho, Song Yun; Allcock, Harry R.

In: Chemistry of Materials, Vol. 19, No. 25, 11.12.2007, p. 6338-6344.

Research output: Contribution to journalArticle

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