Influence of curing agent on dielectric properties of crosslinked poly(vinylalcohol-co-vinylcyanoethoxy)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F18%3A00490822" target="_blank" >RIV/61389013:_____/18:00490822 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/s11696-018-0460-4" target="_blank" >http://dx.doi.org/10.1007/s11696-018-0460-4</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11696-018-0460-4" target="_blank" >10.1007/s11696-018-0460-4</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of curing agent on dielectric properties of crosslinked poly(vinylalcohol-co-vinylcyanoethoxy)

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Influence of curing agent on dielectric properties of crosslinked poly(vinylalcohol-co-vinylcyanoethoxy)

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

<a href="/cs/project/LO1507" target="_blank" >LO1507: Polymery pro pokročilé technologie i kvalitnější život</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Chemical Papers

ISSN

0366-6352

e-ISSN

—

Svazek periodika

72

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

11

Strana od-do

1811-1821

Kód UT WoS článku

000435829800025

EID výsledku v databázi Scopus

2-s2.0-85048860730