Dichroism of Dyed Fibres as a Means of Studying Micellar Arrangement

Abstract

WHY certain types of dyes are adsorbed by cellulose in a definite oriented manner, and how the orientation or alignment of the micelles or crystalline portions is reflected or imitated by such dye molecules as well as how this dye alignment may manifest itself through the phenomenon of dichroism, or of polarized fluorescence, have been discussed.¹ Although, for reasons which will shortly appear, the quantitative studies made by the author have been based solely on polarized fluorescence, ² the phenomenon of dichroism may also be used to advantage in fibre structure studies. This article takes up its use as a quantitative tool, and its advantages and disadvantages when compared with the polarized fluorescence method.