Synthesis and properties of partially fluorinated amorphous ring containing polymers: Poly[bis(2,2-difluorovinyl)formal], poly[bis(2,2-difluorovinyl)difluoroformal], and poly[bis(1-deuterio-2,2-difluorovinyl)difluoroformal]

Yu Yang, František Mikeš, Yasuhiro Koike, Yoshiyuki Okamoto

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Three novel partially fluorinated monomers, bis(2,2-difluorovinyl)formal (I), bis(2,2-difluorovinyl)difluoroformal (II), and bis(1-deuterio-2,2-difluorovinyl)difluoroformal (III), were prepared. These monomers were polymerized in bulk via free radical mechanism. Monomer I produced a cross-linked polymer, but monomers II and III yielded amorphous polymers (II-P and III-P) having five- and six-membered rings along the backbone. Polymers II-P and III-P were soluble not only in fluorinated solvents but also in nonfluorinated solvents such as THF, 1, 4-dioxane, DMF, and DMSO. They have good thermal stability (onset of decomposition >400°C), high glass transition temperatures (105°C), and low dielectric constant (1.98-1.82 at frequency ranging from 0.1 to 3 × 10 6 Hz). Furthermore, these polymers are completely amorphous and possess outstanding optical clarity extending from visible to near-IR regions. The refractive indices of both polymers were measured at various wavelengths to evaluate material dispersion. The material dispersions of II-P and III-P were similar and had low values, which are comparable to perfluorinated polymers and much lower than perdeuterioPMMA. The unique optical properties of these polymers make them attractive for use as optical materials.

Original languageEnglish
Pages (from-to)7918-7923
Number of pages6
JournalMacromolecules
Volume37
Issue number21
DOIs
Publication statusPublished - 2004 Oct 19

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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