Event Title

Isoconversional Analysis for Determining the Cure Kinetic Parameters and Reaction Model of Benzoxazine Resin

Research Mentor(s)

Mark Peyron

Description

The kinetic parameters (activation energy and pre-exponential) for curing of benzoxazine resins have been modeled through isoconversional methods using non-isothermal modulated differential scanning calorimetry data. The Friedman, Popescu, and advanced nonlinear isoconversional methods were used to measure the dependency of activation energy on the extent of conversion. All three isoconversional methods predicted similar activation energy values in a model-free way. The compensation effect was then utilized to determine the dependence of the pre-exponential parameter on the extent of conversion. Combining the MDSC data and kinetic parameters revealed the master shape of the conversion-dependent kinetic model function in which several mathematical functions are suggested. Isoconversional methods elucidate that benzoxazine resin follows complex multi-step kinetics in which simple reaction models are insufficient to model the true curing behavior.

Document Type

Event

Start Date

May 2018

End Date

May 2018

Location

Engineering and Design

Rights

Copying of this document in whole or in part is allowable only for scholarly purposes. It is understood, however, that any copying or publication of this document for commercial purposes, or for financial gain, shall not be allowed without the author’s written permission.

Language

English

Format

application/pdf

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May 17th, 12:00 PM May 17th, 3:00 PM

Isoconversional Analysis for Determining the Cure Kinetic Parameters and Reaction Model of Benzoxazine Resin

Engineering and Design

The kinetic parameters (activation energy and pre-exponential) for curing of benzoxazine resins have been modeled through isoconversional methods using non-isothermal modulated differential scanning calorimetry data. The Friedman, Popescu, and advanced nonlinear isoconversional methods were used to measure the dependency of activation energy on the extent of conversion. All three isoconversional methods predicted similar activation energy values in a model-free way. The compensation effect was then utilized to determine the dependence of the pre-exponential parameter on the extent of conversion. Combining the MDSC data and kinetic parameters revealed the master shape of the conversion-dependent kinetic model function in which several mathematical functions are suggested. Isoconversional methods elucidate that benzoxazine resin follows complex multi-step kinetics in which simple reaction models are insufficient to model the true curing behavior.