Investigation of homopolymerization rate of perfluoro-4,5-substituted-2- methylene-1,3-dioxolane derivatives and properties of the polymers

Yu Yang, František Mikeš, Liang Yang, Weihong Liu, Yasuhiro Koike, Yoshiyuki Okamoto

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Five perfluoro-4,5-substituted-2-methylene-1,3-dioxolane monomers were synthesized. These monomers were found to readily polymerized by a free radical initiator in bulk and/or in solutions. Homopolymerization rates were determined using in situ 19F NMR measurements and found to be 0.25 to 1.66 × 10-4 mol L-1 s-1 in 1,1,2-trichlorotrifluoroethane at 41°C using the perfluorodibenzoyl peroxide as an initiator. The rates depend on the substituents on the 4 and 5 positions of the dioxolane. The purified polymers were thermally stable (up to 350°C). They show low refractive indexes (1.33-1.36 at 532 nm). They are transparent from UV to near IR region and have high glass transition temperatures (100-170°C).

Original languageEnglish
Pages (from-to)277-281
Number of pages5
JournalJournal of Fluorine Chemistry
Volume127
Issue number2
DOIs
Publication statusPublished - 2006 Feb

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initiators
Homopolymerization
methylene
Polymers
polymer
monomers
Monomers
Derivatives
Refractometry
Transition Temperature
Peroxides
polymers
peroxides
free radical
refractive index
Free radicals
free radicals
glass transition temperature
Free Radicals
Glass

Keywords

  • F NMR spectra
  • Perfluoro-4,5-substituted-2-methylene-1,3-dioxolane
  • Polymer properties
  • Polymerization rate

ASJC Scopus subject areas

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

Cite this

Investigation of homopolymerization rate of perfluoro-4,5-substituted-2- methylene-1,3-dioxolane derivatives and properties of the polymers. / Yang, Yu; Mikeš, František; Yang, Liang; Liu, Weihong; Koike, Yasuhiro; Okamoto, Yoshiyuki.

In: Journal of Fluorine Chemistry, Vol. 127, No. 2, 02.2006, p. 277-281.

Research output: Contribution to journalArticle

Yang, Yu ; Mikeš, František ; Yang, Liang ; Liu, Weihong ; Koike, Yasuhiro ; Okamoto, Yoshiyuki. / Investigation of homopolymerization rate of perfluoro-4,5-substituted-2- methylene-1,3-dioxolane derivatives and properties of the polymers. In: Journal of Fluorine Chemistry. 2006 ; Vol. 127, No. 2. pp. 277-281.
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AU - Mikeš, František

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AU - Liu, Weihong

AU - Koike, Yasuhiro

AU - Okamoto, Yoshiyuki

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AB - Five perfluoro-4,5-substituted-2-methylene-1,3-dioxolane monomers were synthesized. These monomers were found to readily polymerized by a free radical initiator in bulk and/or in solutions. Homopolymerization rates were determined using in situ 19F NMR measurements and found to be 0.25 to 1.66 × 10-4 mol L-1 s-1 in 1,1,2-trichlorotrifluoroethane at 41°C using the perfluorodibenzoyl peroxide as an initiator. The rates depend on the substituents on the 4 and 5 positions of the dioxolane. The purified polymers were thermally stable (up to 350°C). They show low refractive indexes (1.33-1.36 at 532 nm). They are transparent from UV to near IR region and have high glass transition temperatures (100-170°C).

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