English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Synopsis Dye dichroism can be used to determine the mean amorphous orientation. For this purpose, absorbed dyes must be dispersed uniformly in a whole amorphous region. This uniform dispersion may not always occurs in all cases. When the oriented cellulose and polyvinyl alcohol films are dyed with direct dichroic dyes, small amounts of dye molecules are absorbed preferentially into the higher order region of the polymer chain. With an increase of amount, dye molecules disperse uniformly in the whole amorphous region and the obserbed dichroism approaches to the mean amorphous orientation. But, the dye molecule of longer length has a lower preferential absorption. The preferential absorption phenomena relates to the affinity of dye to polymer and to the steric hindrance of dye diffusion into the narrow gaps of the higher order polymer chains. The study of dichroism of polymer at low content values of the dichroic dye may be useful for obtaining information on the lateral order of amorphous polymer chains. Conversely, to determin the mean amorphous orientation, the lower concentration dyeing must be avoided.

PREFERENTIAL ABSORPTION OF DYE TO THE HIGHER ORDER AMORPHOUS REGION