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Influence of curing agent on dielectric properties of crosslinked poly(vinylalcohol-co-vinylcyanoethoxy)
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SYSNO ASEP 0490822 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Influence of curing agent on dielectric properties of crosslinked poly(vinylalcohol-co-vinylcyanoethoxy) Author(s) Piana, Francesco (UMCH-V) RID, ORCID
Paruzel, Bartosz (UMCH-V) RID, ORCID
Pfleger, Jiří (UMCH-V) RIDSource Title Chemical Papers. - : Springer - ISSN 0366-6352
Roč. 72, č. 7 (2018), s. 1811-1821Number of pages 11 s. Language eng - English Country SK - Slovakia Keywords dielectric properties ; thermal stability ; curing agents Subject RIV CD - Macromolecular Chemistry OECD category Polymer science R&D Projects LO1507 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UMCH-V - RVO:61389013 UT WOS 000435829800025 EID SCOPUS 85048860730 DOI 10.1007/s11696-018-0460-4 Annotation Organic electronic devices require dielectric layers made from materials with high dielectric constant (ε′) and good dielectric strength, which allow reducing the threshold voltage and decreasing the power consumption of electronic circuitry. Poly(vinylalcohol-co-vinylcyanoethoxy) (CEPVA) has high ε′ (≈ 15) and low conductivity (σ′), which are exactly the characteristics needed for dielectrics. Its Tg close to room temperature limits, however, its applicability in electronics and improvements of its stability and mechanical properties are necessary. Here, we report on curing of this polymer, exploiting the residual hydroxyl groups present in the polymers after reaction of the parent poly(vinylalcohol) with acrylonitrile. Different curing agents were tested and showed a strong influence on the relaxation phenomena of the crosslinked polymer. The reduced mobility of backbone and side groups of the polymer decreased ε′ but improved the mechanical stability at high temperature and decreased σ′, especially at low frequencies, where ionic conductivity and interface polarization usually occur. At the same time, the hydrophilicity of the polymer was reduced. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2019
Number of the records: 1