Mechanism of generation of birefringence in poly(methyl methacrylate/styrene)

Takumi Kojo, Akihiro Tagaya, Yasuhiro Koike

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8 Citations (Scopus)


The relationship between the intrinsic birefringence and the composition ratio and between the photoelastic coefficient and the composition ratio in poly(methyl methacrylate (MMA)/styrene (St)) was investigated. A linear relationship was observed between the orientational birefringence and the composition ratio but not between the photoelastic coefficient and the composition ratio. The influence of the compositional distribution on the birefringence was investigated, and the results suggested that the compositional distribution of poly(MMA/St) minimally affects birefringence. We also analyzed the mechanism by which birefringence is generated in poly(MMA/St) by focusing on changes in St conformation. The results of this analysis suggested that the conformational changes in St units are different for orientational and photoelastic birefringence generation.

Original languageEnglish
Pages (from-to)167-173
Number of pages7
JournalPolymer Journal
Issue number2
Publication statusPublished - 2012 Feb 1



  • compositional analysis
  • conformational distribution
  • infrared spectroscopy
  • orientational birefringence
  • photoelastic birefringence
  • reactivity ratio

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry

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