Ana-Maria Grigoriu, Constantin Luca,  Aurelia Grigoriu, Gabriela Hitruc<br>Spectral Study of  Oriented Nanostructured  Surfaces  of  Some Polymers Functionalized  with  Monochlorotriazinyl-b-cyclodextrin

Ana-Maria Grigoriu, Constantin Luca, Aurelia Grigoriu, Gabriela Hitruc
Spectral Study of Oriented Nanostructured Surfaces of Some Polymers Functionalized with Monochlorotriazinyl-b-cyclodextrin

Abstract:

This paper presents the practical strategies of obtaining the oriented nanostructured surfaces of some polymers functionalized with monochlorotriazinyl-b-cyclodextrin (MCT-b-CD) by uniaxial rubbing. We have chosen for the present study three polymers (copoly(styrene-allylalcohol), poly-4-vinylphenol, polyvinyl alcohol) with hydroxyl groups allowing the grafting of the reactive product monochlorotriazinyl-b-cyclodextrin. The obtained oriented nanostructures align colourless nematic liquid crystals (NLC) or NLC coloured with a dichroic dye. The orientation of NLC has been studied by means of polarized light FT-IR spectroscopy (IR dichroism) and polarized light UV-Vis spectroscopy (Vis dichroism). For poly-4-vinylphenol, both the initial polymer and the chemically modified product have an exotic behaviour with regard to the ability of orientating the NLC, namely perpendicularly to the rubbing direction. Keywords: monochlorotriazinyl-b-cyclodextrin, copoly(styrene-allylalcohol), poly-4-vinylphenol, polyvinyl alcohol, oriented nanostructured surface, nematic liquid crystal

Issue: 2012, Volume 63, Issue 5

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