Abstract
IN this laboratory we have been studying for some time the polarized infra-red spectra of single fibres and filaments. A 0.78 N.A. reflecting microscope of our own design, used with a Perkin–Elmer Model 12-C infra-red spectrometer in an arrangement similar to that of Blout, Bird and Grey1, has allowed examination of specimens as narrow as 20 microns in width. Polarized radiation was obtained with a silver chloride sheet transmission polarizer. The very thin specimens required for the fundamental region of the spectrum were prepared by either longitudinally sectioning or mechanically flattening the single fibres.
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References
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QUYNN, R., STEELE, R. Infra-Red Dichroism of Nylon and Polyethylene Terephthalate. Nature 173, 1240 (1954). https://doi.org/10.1038/1731240a0
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DOI: https://doi.org/10.1038/1731240a0
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