Properties of some azo-copolyimide thin films used in the formation of photoinduced surface relief gratings

Autor:	Ada Burescu, Valentina Musteata, Valentin Pohoata, Ionut Topala, Ilarion Mihaila, Iuliana Stoica, Ion Sava, Mariana Cristea
Rok vydání:	2015
Předmět:	chemistry.chemical_classification Materials science business.industry General Chemical Engineering General Chemistry Dielectric Polymer Casting Dimethylacetamide chemistry.chemical_compound Optics chemistry Azobenzene Chemical engineering Thermal stability Thin film business Macromolecule
Zdroj:	RSC Advances. 5:10125-10133
ISSN:	2046-2069
DOI:	10.1039/c4ra14218g
Popis:	Thin free standing films have been obtained by casting from dimethylacetamide solutions of some azo-copolyimides. The dynamo-mechanical and dielectric properties, and the effect of the chemical structure of polymers on the physical properties are investigated. The incorporation of substituted azobenzene groups and hexafluoroisopropylidene units in the macromolecular chain allowed the patterning of the materials under different irradiation conditions. The azo-copolyimide thin films showed high thermal stability, low dielectric constant, good dynamo-mechanical characteristics and uniform surface relief gratings.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a69f75af8ebe16f17ef905c0647423ac https://doi.org/10.1039/c4ra14218g Zobrazit plný text záznamu