Copolymers of methyl methacrylate with N-trifluorophenyl maleimides: High glass transition temperature and low birefringence polymers

Liping Lou, Akihiro Tagaya, Yoko Ide, Yasuhiro Koike, Yoshiyuki Okamoto

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Copolymers of methyl methacrylate (MMA) with 2,3,4- and 2,4,6-trifluorophenyl maleimides (TFPMIs) were synthesized by a free radical initiator, azobisisobutyronitrile, in 1,4-dioxane and also in bulk. The refractive indexes of the copolymers were in the range of 1.49-1.52 at 532 nm. The T gs were 133-195 °C depending on copolymer compositions. In addition, the copolymers were thermally stable, T d > 350 °C. The orientational and photoelastic birefringence of the copolymers were also investigated. As both of the orientational and photoelastic birefringences of PMMA are negative, whereas those of poly(TFPMI)s are positive, we could obtain nearly zero orientational and photoelastic birefringence polymers when the ratios of 2,3,4-TFPMI/MMA were 15/85 and 5/95 mol %, respectively. For 2,4,6-TFPMI, zero orientational and photoelastic birefringences could be obtained when the ratios of 2,4,6-TFPMI/MMA were 12/88 and 3/97 mol %, respectively. The T gs of those copolymers with zero birefringences were in the range of 135-140 °C.

Original languageEnglish
Pages (from-to)3530-3536
Number of pages7
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume50
Issue number17
DOIs
Publication statusPublished - 2012 Sep 1

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Keywords

  • N-trifluorophenyl maleimides
  • copolymerization
  • fluoropolymers
  • methyl methacrylate
  • orientational and photoelastic birefringence
  • thermal properties

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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