Alternating copolymerization of bis(hexafluoroisopropyl) fumarate with styrene and vinyl pentafluorobenzoate: Transparent and low refractive index polymers

Hongxiang Teng, Weihong Liu, Yasuhiro Koike, Yoshiyuki Okamoto

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Bis(hexafluoroisopropyl) fumarate (BHFIPF) did not homopolymerize with free radical initiators. However, BHFIPF yielded alternating copolymers with styrene in bulk with Azobisisobutyronitrile (AIBN) as a radical initiator. The monomer reactivity ratios of BHFIPF (M1) and styrene (M2) were calculated as r1 = 0.00 and r2 = 0.02. BHFIPF also copolymerized with vinyl pentafluorobenzoate (VPFB) in bulk and in pentafluoroisopropanol solution to produce an alternating copolymer. The reactivity ratios of BHFIPF (M1) with VPFB (M2) were r1 = 0.00 and r2 = 0.05 in bulk and r1 = 0.01 and r2 = 0.11 in pentafluoroisopropanol, respectively. The glass transition temperatures (Tg) of the BHFIPF-styrene and BHFIPF-VPFB copolymers were 107 and 86 °C, respectively. The BHFIPF-styrene copolymer was thermally stable, and the thermal degradation temperature (Td) was 400 °C, whereas the Td of BHFIPF-VPFB copolymer was 240 °C. The films obtained by casting from tetrahydrofuran (THF) solutions of these copolymers were flexible and transparent. Their refractive indices were 1.4048 for the BHFIPF-styrene copolymer, and 1.3980 for the BHFIPF-VPFB copolymer at 633 nm, respectively.

Original languageEnglish
Pages (from-to)2834-2838
Number of pages5
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume49
Issue number13
DOIs
Publication statusPublished - 2011 Jul 1

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Keywords

  • copolymerization
  • fluoropolymers
  • refractive index
  • styrene

ASJC Scopus subject areas

  • Materials Chemistry
  • Polymers and Plastics
  • Organic Chemistry

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