Mechanisms of orientational and photoelastic birefringence generation of methacrylates for the design of zero-zero-birefringence polymers

Houran Shafiee, Shotaro Beppu, Shuhei Iwasaki, Akihiro Tagaya, Yasuhiro Koike

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The intrinsic birefringence Δn<sup>0</sup> and photoelastic coefficient C of poly(methyl methacrylate), poly(2,2,2-trifluroethyl methacrylate), poly(phenyl methacrylate), and poly(2,2,3,3,3-pentafluorophenyl methacrylate) were determined. We categorized these methacrylate polymers into four birefringence-types, even though their molecular structures differed only by the substituents on the side chains. Based on the results of Δn<sup>0</sup> and C, novel polymers that exhibit neither orientational nor photoelastic birefringence, i.e., zero-zero-birefringence polymers, were designed and synthesized by quaternary copolymerization system. Furthermore, we confirmed that the mechanisms of orientational birefringence and photoelastic birefringence generation were different in these methacrylate polymers. The conformation of the repeat unit of the polymers was nearly constant during the generation of orientational birefringence. In contrast, the conformation of the repeat unit of the polymers changed during the generation of photoelastic birefringence in the glassy state. These findings demonstrated the reasonability of evaluating orientational and photoelastic birefringence separately, as well as the adequacy of the classification of polymers into four birefringence-types. Given these results and the fact that zero-zero-birefringence polymers could be prepared successfully by four-birefringence type monomers, we demonstrated the reasonability of the method for designing the zero-zero-birefringence polymers.

Original languageEnglish
Pages (from-to)1330-1338
Number of pages9
JournalPolymer Engineering and Science
Volume55
Issue number6
DOIs
Publication statusPublished - 2015 Jun 1

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Methacrylates
Birefringence
Polymers
Conformations
Polymethyl Methacrylate
Polymethyl methacrylates
Copolymerization
Molecular structure
Monomers

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry
  • Chemistry(all)

Cite this

Mechanisms of orientational and photoelastic birefringence generation of methacrylates for the design of zero-zero-birefringence polymers. / Shafiee, Houran; Beppu, Shotaro; Iwasaki, Shuhei; Tagaya, Akihiro; Koike, Yasuhiro.

In: Polymer Engineering and Science, Vol. 55, No. 6, 01.06.2015, p. 1330-1338.

Research output: Contribution to journalArticle

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