Synthesis of a zero-birefringence polymer doped with an inorganic birefringent crystal

H. Ohkita, A. Tagaya, Y. Koike

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


Birefringence induced by the orientation of polymer main chains during injection-moulding or extrusion processing restricts the application of optical polymers to optical devices that require the polarization state of incident light to be maintained. To compensate this birefringence of polymers we propose using the "birefringent crystal dopant method" - homogeneous doping with an opposite birefringent needle-like crystal. Strontium carbonate (SrCO3) was selected for this purpose and synthesized, with a length of about 200nm and a width of about 20nm. SrCO3 was doped into poly(MMA/BzMA= 78/22(wt./wt.)) film. The film was uniaxially drawn at 130°C and 4mm/min. For the first time, the positive birefringence of the drawn copolymer film at a wavelength of 633nm was compensated by doping with 0.3wt.% of SrCO3 without loss of transparency and thermostability.

Original languageEnglish
Pages (from-to)143-148
Number of pages6
JournalSolid State Phenomena
Publication statusPublished - 2004
EventProceedings of Symposium F European Materials Research Society Fall Meeting 2003 - Warsaw, Poland
Duration: 2003 Sept 152003 Sept 19


  • Birefringence
  • Birefringent crystal dopant method
  • Inorganic crystal
  • Optical polymer
  • Strontium carbonate
  • Zero-birefringence

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics


Dive into the research topics of 'Synthesis of a zero-birefringence polymer doped with an inorganic birefringent crystal'. Together they form a unique fingerprint.

Cite this