influence of macromolecular architecture on the optical and humidity-sensing properties of poly(n,n-dimethylacrylamide)-based block copolymers

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ID: 144042
2018
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Abstract
The influence of the macromolecular architecture of block copolymers containing poly(N,N-dimethyl acrylamide) (PDMA) on the optical characteristics and sensing properties of corresponding thin films is discussed. Series of hydrophilic PDMA-based copolymers of different chemical composition and chain architecture such as triblock, star-shaped, and branched were synthesized. The copolymers were characterized using conventional spectroscopic techniques as well as methods for characterization of copolymer macromolecular characteristics in solution, namely size-exclusion chromatography and static light scattering. Thin films of the copolymers of nanometer scale thickness were deposited on silicon substrates by the spin-coating method. The refractive index and extinction coefficient of the copolymer films were calculated from the reflectance spectra by using non-linear curve fitting methods and the composition-structure-optical properties relationships were evaluated. Humidity-sensing properties of the films were studied by measuring reflectance spectra of the films at a relative humidity range from 5 to 95%RH. The implementation of the copolymer films as optical sensors of humidity is justified and discussed.
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lazarova2018polymersinfluence Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Katerina Lazarova;Marina Vasileva;Sijka Ivanova;Christo Novakov;Darinka Christova;Tsvetanka Babeva
Journal Journal of Fluorescence
Year 2018
DOI
10.3390/polym10070769
URL
http://www.mdpi.com/2073-4360/10/7/769
Keywords
thin films

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