Volume 140, Issue 21 e53887
RESEARCH ARTICLE

Reduced graphene oxide catalytically enhances the rate of cyanate ester curing under variable frequency microwave heating

Matthew Warner

Matthew Warner

Georgia Institute of Technology, Chemical and Biomolecular Engineering, 311 Ferst Dr, Atlanta, Georgia, USA

Contribution: Formal analysis (lead), Writing - original draft (lead)

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Tiffany Jeng

Tiffany Jeng

Georgia Institute of Technology, Chemical and Biomolecular Engineering, 311 Ferst Dr, Atlanta, Georgia, USA

Contribution: Data curation (supporting), ​Investigation (supporting)

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Sonya Ayar

Sonya Ayar

Georgia Institute of Technology, Chemical and Biomolecular Engineering, 311 Ferst Dr, Atlanta, Georgia, USA

Contribution: ​Investigation (supporting)

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Shraddha Sekhar

Shraddha Sekhar

Georgia Institute of Technology, Chemical and Biomolecular Engineering, 311 Ferst Dr, Atlanta, Georgia, USA

Contribution: ​Investigation (supporting)

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Delfina Marin

Delfina Marin

Georgia Institute of Technology, Chemical and Biomolecular Engineering, 311 Ferst Dr, Atlanta, Georgia, USA

Contribution: ​Investigation (supporting)

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Anthony Engler

Anthony Engler

Georgia Institute of Technology, Chemical and Biomolecular Engineering, 311 Ferst Dr, Atlanta, Georgia, USA

Contribution: Formal analysis (supporting)

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Danielle Coverdell

Danielle Coverdell

Department of Energy's Kansas City, National Security Campus, Honeywell FM&T, 14520 Botts Road, Kansas City, 64147 USA

Contribution: Conceptualization (lead), Funding acquisition (supporting), ​Investigation (supporting)

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Jackson Ham

Jackson Ham

Department of Energy's Kansas City, National Security Campus, Honeywell FM&T, 14520 Botts Road, Kansas City, 64147 USA

Contribution: Conceptualization (supporting), Formal analysis (supporting), Funding acquisition (supporting)

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Paul Kohl

Corresponding Author

Paul Kohl

Georgia Institute of Technology, Chemical and Biomolecular Engineering, 311 Ferst Dr, Atlanta, Georgia, USA

Correspondence

Paul Kohl, Georgia Institute of Technology, Chemical and Biomolecular Engineering, 311 Ferst Dr., Atlanta, GA 30332-0100, USA.

Email: [email protected]

Contribution: Conceptualization (supporting), Formal analysis (supporting), Project administration (lead), Supervision (lead), Writing - original draft (supporting), Writing - review & editing (lead)

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First published: 21 March 2023

Abstract

The curing of Lonza Primaset PT-30 novolac cyanate ester resin and EPON 826 bisphenol-A diglycidyl ether were investigated using convective thermal heating and variable frequency microwave (VFM) heating. The addition of 1 part per hundred reduced graphene oxide (r-GO) to PT-30 novolac cyanate ester increased the VFM cure rate compared to thermal heating. Curing it at 160°C for 240 min with VFM heating resulted in a 55% degree of cure compared to a 26% degree of cure with thermal heating. This observed VFM rate enhancement is due to selective microwave heating of the r-GO particles in the resin resulting in increased r-GO catalytic activity toward cyanate ester curing. It is both a thermal and catalytic effect, the latter of which is absent when r-GO is added to a bisphenol-A diglycidyl ether resin with o-phenylenediamine hardener. Impurities present in the PT-30 matrix do not appear to contribute to its overall cure kinetics, nor do they participate in the observed VFM rate enhancement.

DATA AVAILABILITY STATEMENT

Research data are not shared.

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