Size exclusion chromatography characterization of poly (ether ether ketone), PEEK, after chemical modification

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F23%3A39920552" target="_blank" >RIV/00216275:25310/23:39920552 - isvavai.cz</a>

Výsledek na webu

<a href="https://onlinelibrary.wiley.com/doi/10.1002/app.54259" target="_blank" >https://onlinelibrary.wiley.com/doi/10.1002/app.54259</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/app.54259" target="_blank" >10.1002/app.54259</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Size exclusion chromatography characterization of poly (ether ether ketone), PEEK, after chemical modification

Popis výsledku v původním jazyce

Characterization of the molar mass distribution (MMD) of poly (ether ether ketone) (PEEK) is very troublesome due to the insolubility of PEEK in common solvents. The solubility of PEEK may be substantially improved after its sulfonation. Sulfonated PEEK (SPEEK) was prepared by sulfonation of PEEK with 98% concentrated H2SO4 at room temperature. The presence of sulfonic acid group (-SO3H) in PEEK matrix was confirmed by nuclear magnetic resonance and Fourier transform infrared spectroscopy. The degree of sulfonation (DS similar to 95%) was determined by proton nuclear magnetic resonance in deuterated dimethyl sulfoxide and by thermal analysis methods. The equivalent molar mass and MMD of sulfonated PEEK was determined at 30 degrees C in three polar solvents (N,N-dimethylacetamide, N,N-dimethylformamide N-methyl-2-pyrollidone) in PS/DVB column using calibration with PMMA standards. A salt (LiBr) was added to the solvents for suppression of undesired interactions of analytes with the column packing. Moreover, the sulphonated PEEK was separated with size exclusion chromatography (SEC) coupled to a multi-angle light scattering (MALS) detector. It was found that the absolute average molar mass of SPEEK from the MALS detection is much closer to the value measured by SEC in N,N-dimethylacetamide +LiBr than the values determined in N,N-dimethylformamide and N-methyl-2-pyrollidone.

Název v anglickém jazyce

Size exclusion chromatography characterization of poly (ether ether ketone), PEEK, after chemical modification

Popis výsledku anglicky

Characterization of the molar mass distribution (MMD) of poly (ether ether ketone) (PEEK) is very troublesome due to the insolubility of PEEK in common solvents. The solubility of PEEK may be substantially improved after its sulfonation. Sulfonated PEEK (SPEEK) was prepared by sulfonation of PEEK with 98% concentrated H2SO4 at room temperature. The presence of sulfonic acid group (-SO3H) in PEEK matrix was confirmed by nuclear magnetic resonance and Fourier transform infrared spectroscopy. The degree of sulfonation (DS similar to 95%) was determined by proton nuclear magnetic resonance in deuterated dimethyl sulfoxide and by thermal analysis methods. The equivalent molar mass and MMD of sulfonated PEEK was determined at 30 degrees C in three polar solvents (N,N-dimethylacetamide, N,N-dimethylformamide N-methyl-2-pyrollidone) in PS/DVB column using calibration with PMMA standards. A salt (LiBr) was added to the solvents for suppression of undesired interactions of analytes with the column packing. Moreover, the sulphonated PEEK was separated with size exclusion chromatography (SEC) coupled to a multi-angle light scattering (MALS) detector. It was found that the absolute average molar mass of SPEEK from the MALS detection is much closer to the value measured by SEC in N,N-dimethylacetamide +LiBr than the values determined in N,N-dimethylformamide and N-methyl-2-pyrollidone.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Journal of Applied Polymer Science

ISSN

0021-8995

e-ISSN

1097-4628

Svazek periodika

140

Číslo periodika v rámci svazku

32

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

"e54259"

Kód UT WoS článku

001000674600001

EID výsledku v databázi Scopus

2-s2.0-85161429934