Synthesis and characterization of copolymers of perfluoro(2-methylene-4,5- dimethyl-1,3-dioxolane) and perfluoro(2-methylene-1,3-dioxolane)

Kotaro Koike, František Mikeš, Hao Zhang, Yasuhiro Koike, Yoshiyuki Okamoto

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Amorphous perfluorinated polymers with outstanding unique properties have established a solid position in various fields, but less costly preparations are required for practical application. Here, copolymers of perfluoro(2-methylene- 4,5-dimethyl-1,3-dioxolane) I and perfluoro(2-methylene-1,3-dioxolane) II are synthesized, and the effect of composition on various properties is studied. The copolymers are found to be almost ideal random copolymers with monomer reactivity ratios of r1 = 1.12 and r2 = 1.32. When the amount of II is 0-70 mol%, the copolymers are completely amorphous, optically transparent, and soluble in fluorinated solvents. The glass transition temperatures (Tg) of the copolymers are lower than the sum of the products of the weight fractions of the monomer units and their respective Tg values, suggesting the presence of attractive intermolecular interactions in the homopolymer of I. The copolymers show low refractive indices (1.32-1.34) and high decomposition temperatures (>378 C), which are comparable with or even better than those of conventional amorphous perfluorinated polymers.

Original languageEnglish
Pages (from-to)198-202
Number of pages5
JournalJournal of Fluorine Chemistry
Volume156
DOIs
Publication statusPublished - 2013

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Keywords

  • Copolymer
  • Crystallinity
  • Perfluoro(2-methylene-1 3-dioxolane)
  • Perfluoro(2-methylene-4 5-dimethyl-1 3-dioxolane)
  • X-ray diffraction

ASJC Scopus subject areas

  • Biochemistry
  • Inorganic Chemistry
  • Organic Chemistry
  • Physical and Theoretical Chemistry
  • Environmental Chemistry

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