Abstract
IN a recent study of the NHCO group in polyamides and proteins1 it was found that the peak extinction value of the infra-red fundamental NH absorption band at 3,300 cm.−1 for nylon 6 depended on the mode of preparation of the specimen film under examination. Films cast from dry formic acid by rapid evaporation of the acid gave lower extinction values referred to the CH absorption band than films subjected to heat annealling.
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References
Wood, F., and King, G., Trans. Textile Inst. (to be published).
Richards, R. E., and Thompson, H. W., Trans. Farad. Soc., 41, 183 (1945).
Holliday, P., Disc. Farad. Soc., 9, 325 (1950).
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KING, G., WOOD, F. Infra-Red Extinction Coefficients for Amorphous and Crystalline Nylon. Nature 195, 1093–1094 (1962). https://doi.org/10.1038/1951093a0
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DOI: https://doi.org/10.1038/1951093a0
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