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Proceedings Paper

Electro-optic properties of chiral helix oligo-L-lactic acid
Author(s): Tatsumi Kimura; Takashi Fukuda; Satoru Shimada; Hiro Matsuda
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Paper Abstract

Chiral helix materials have large optical rotatory power, and therefore, their application has been caught much attention for optical elements and/or optical switching devices. Among such helical polymers, chiral poly-lactic acid can be easily synthesized without racemization. However, the film formation of poly-lactic acid for optical application is difficult because of the high crystallinity. We synthesized the chiral oligo-L-lactic acid with the definite degree of polymerization by using GPC fractionation technique and found that the optical rotatory power reached to a saturated constant value even in the octamer. Such oligomers whose repeating units are less than 14 are liquid state at ambient temperature. These results indicate that the helical structure has stably existed even in the low molecular weight oligomers. The oligo-L-lactic acid could be oriented in liquid crystalline cell and by electro-poling treatment. The orientation structure was discussed from ORD spectra and SHG measurement.

Paper Details

Date Published: 12 December 2002
PDF: 8 pages
Proc. SPIE 4799, Liquid Crystals VI, (12 December 2002); doi: 10.1117/12.453297
Show Author Affiliations
Tatsumi Kimura, National Institute of Advanced Industrial Science and Technology (Japan)
Takashi Fukuda, National Institute of Advanced Industrial Science and Technology (Japan)
Satoru Shimada, National Institute of Advanced Industrial Science and Technology (Japan)
Hiro Matsuda, National Institute of Advanced Industrial Science and Technology (Japan)


Published in SPIE Proceedings Vol. 4799:
Liquid Crystals VI
Iam-Choon Khoo, Editor(s)

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