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Influence of Macromolecular Architecture on the Optical and Humidity-Sensing Properties of Poly( N , N -Dimethylacrylamide)-Based Block Copolymers.
- Source :
-
Polymers [Polymers (Basel)] 2018 Jul 13; Vol. 10 (7). Date of Electronic Publication: 2018 Jul 13. - Publication Year :
- 2018
-
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.
Details
- Language :
- English
- ISSN :
- 2073-4360
- Volume :
- 10
- Issue :
- 7
- Database :
- MEDLINE
- Journal :
- Polymers
- Publication Type :
- Academic Journal
- Accession number :
- 30960694
- Full Text :
- https://doi.org/10.3390/polym10070769