Isothermal crystallization of poly(vinylidene fluoride) blended with the ionic liquid [Emim]2[Co(SCN)4]: Simultaneous analysis of crystalline phases by infrared spectroscopy and differential scanning calorimetry

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10491350" target="_blank" >RIV/00216208:11320/24:10491350 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=pViyboc5bK" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=pViyboc5bK</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.polymer.2024.126816" target="_blank" >10.1016/j.polymer.2024.126816</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Isothermal crystallization of poly(vinylidene fluoride) blended with the ionic liquid [Emim]2[Co(SCN)4]: Simultaneous analysis of crystalline phases by infrared spectroscopy and differential scanning calorimetry

Popis výsledku v původním jazyce

The combination of poly (vinylidene fluoride) (PVDF) with ionic liquids (ILs) is increasingly being studied for the development of smart materials. Together with the functional response provided by the IL, its incorporation into PVDF allows to nucleate specific electroactive phases of the polymer, depending on the processing conditions. Thus, the isothermal crystallization of PVDF incorporating different contents of the magnetic ionic liquid bis(1ethyl-3-methylimidazolium) tetrathiocyanatocobaltate ([Emim]2 [Co(SCN)4]) is reported in this work. Morphological properties of the films were obtained by field emission scanning electronic microscopy (FESEM), and particularly, for the higher contents of IL, segregation was observed through artifacts present on the film surface. This fact has been further confirmed by energy-dispersive x-ray spectroscopy (EDX). The growth of the crystalline phases of PVDF during isothermal crystallization at different temperatures has been analyzed by Fourier transform infrared (FTIR) spectroscopy. Although alpha, beta and gamma crystalline phases were present in all samples, their relative percentages varied greatly with the amount of IL present, demonstrating that [Emim]2 [Co(SCN)4] is a strong inductor of the electroactive (EA) phases of PVDF. By evaluating both FTIR and DSC data, this effect has been ascribed to the higher melting temperatures of the EA structures whose formation is favored at higher crystallization temperatures. The melting temperature (Tm) of the beta phase is higher than that of the alpha phase, whereas Tm for the gamma phase is higher than for alpha and beta phases. Thus, together with the specific functional properties provided by the IL, such as magnetic response and ionic conductivity, the addition of [Emim]2 [Co(SCN)4] strongly influences PVDF&apos;s crystallization kinetics, proving to be a simple and very effective way to nucleate specific phases of PVDF, according also to the specific processing conditions.

Název v anglickém jazyce

Isothermal crystallization of poly(vinylidene fluoride) blended with the ionic liquid [Emim]2[Co(SCN)4]: Simultaneous analysis of crystalline phases by infrared spectroscopy and differential scanning calorimetry

Popis výsledku anglicky

The combination of poly (vinylidene fluoride) (PVDF) with ionic liquids (ILs) is increasingly being studied for the development of smart materials. Together with the functional response provided by the IL, its incorporation into PVDF allows to nucleate specific electroactive phases of the polymer, depending on the processing conditions. Thus, the isothermal crystallization of PVDF incorporating different contents of the magnetic ionic liquid bis(1ethyl-3-methylimidazolium) tetrathiocyanatocobaltate ([Emim]2 [Co(SCN)4]) is reported in this work. Morphological properties of the films were obtained by field emission scanning electronic microscopy (FESEM), and particularly, for the higher contents of IL, segregation was observed through artifacts present on the film surface. This fact has been further confirmed by energy-dispersive x-ray spectroscopy (EDX). The growth of the crystalline phases of PVDF during isothermal crystallization at different temperatures has been analyzed by Fourier transform infrared (FTIR) spectroscopy. Although alpha, beta and gamma crystalline phases were present in all samples, their relative percentages varied greatly with the amount of IL present, demonstrating that [Emim]2 [Co(SCN)4] is a strong inductor of the electroactive (EA) phases of PVDF. By evaluating both FTIR and DSC data, this effect has been ascribed to the higher melting temperatures of the EA structures whose formation is favored at higher crystallization temperatures. The melting temperature (Tm) of the beta phase is higher than that of the alpha phase, whereas Tm for the gamma phase is higher than for alpha and beta phases. Thus, together with the specific functional properties provided by the IL, such as magnetic response and ionic conductivity, the addition of [Emim]2 [Co(SCN)4] strongly influences PVDF&apos;s crystallization kinetics, proving to be a simple and very effective way to nucleate specific phases of PVDF, according also to the specific processing conditions.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Polymer

ISSN

0032-3861

e-ISSN

1873-2291

Svazek periodika

296

Číslo periodika v rámci svazku

březen

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

126816

Kód UT WoS článku

001205848600001

EID výsledku v databázi Scopus

2-s2.0-85186121391