Optimization of the curing process of epoxy resins using methods of structural analysis

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23220%2F16%3A43929652" target="_blank" >RIV/49777513:23220/16:43929652 - isvavai.cz</a>

Výsledek na webu

<a href="http://ieeexplore.ieee.org/document/7785450/" target="_blank" >http://ieeexplore.ieee.org/document/7785450/</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/CEIDP.2016.7785450" target="_blank" >10.1109/CEIDP.2016.7785450</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Optimization of the curing process of epoxy resins using methods of structural analysis

Popis výsledku v původním jazyce

Epoxy resins belong among materials frequently used for the production of impregnating composites especially for the construction of motors, generators, and transformers. During production, great emphasis must be focused on the proper curing process of these materials. Otherwise, it is not possible to guarantee the satisfactory properties of the final product. The paper is therefore focused on the analysis of the level of curing of epoxy resin by methods of structural analyses. The Fourier Transform Infrared Spectroscopy (FT-IR) and glass transition temperature evaluated from a reversible signal of heat flow measured by modulated differential scanning calorimetry (MDSC) were used. Curing process was performed in a laboratory oven. Partly and fully cured samples were analyzed during two independent experiments. These two experiments differ to each other especially by different times of sampling. The trend of the changes of infrared spectra measured on samples during the curing process corresponds well with the results of the glass transitions temperature measurements obtained by MDSC. Insufficient curing state is relatively well detectable by the presence of the spectral bands corresponding to the vibration of epoxy and anhydride groups (901, 1875, 1786 cm-1). Both methods are acceptable to detection of the curing level but with different sensitivity. While infrared spectroscopy is possible to use for prediction especially short times of curing, analysis of the glass transition is sensitive during the whole curing process.

Název v anglickém jazyce

Optimization of the curing process of epoxy resins using methods of structural analysis

Popis výsledku anglicky

Epoxy resins belong among materials frequently used for the production of impregnating composites especially for the construction of motors, generators, and transformers. During production, great emphasis must be focused on the proper curing process of these materials. Otherwise, it is not possible to guarantee the satisfactory properties of the final product. The paper is therefore focused on the analysis of the level of curing of epoxy resin by methods of structural analyses. The Fourier Transform Infrared Spectroscopy (FT-IR) and glass transition temperature evaluated from a reversible signal of heat flow measured by modulated differential scanning calorimetry (MDSC) were used. Curing process was performed in a laboratory oven. Partly and fully cured samples were analyzed during two independent experiments. These two experiments differ to each other especially by different times of sampling. The trend of the changes of infrared spectra measured on samples during the curing process corresponds well with the results of the glass transitions temperature measurements obtained by MDSC. Insufficient curing state is relatively well detectable by the presence of the spectral bands corresponding to the vibration of epoxy and anhydride groups (901, 1875, 1786 cm-1). Both methods are acceptable to detection of the curing level but with different sensitivity. While infrared spectroscopy is possible to use for prediction especially short times of curing, analysis of the glass transition is sensitive during the whole curing process.

Druh

D - Stať ve sborníku

CEP obor

JA - Elektronika a optoelektronika, elektrotechnika

OECD FORD obor

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Projekt

<a href="/cs/project/LO1607" target="_blank" >LO1607: RICE – Nové technologie a koncepce pro inteligentní průmyslové systémy</a><br>

Návaznosti

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

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název statě ve sborníku

Annual Report : Conference on Electrical Insulation and Dielectric Phenomena (CEIDP 2016)

ISBN

978-1-5090-4654-6

ISSN

0084-9162

e-ISSN

—

Počet stran výsledku

4

Strana od-do

271-274

Název nakladatele

IEEE

Místo vydání

Piscataway

Místo konání akce

Toronto, Canada

Datum konání akce

16. 10. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000391639700053