Theoretical evaluation and the effect of thermal degradation on the Time–Temperature–Transformation (TTT) diagram of bisphenol A epoxies

Stütz, Herbert

doi:10.1002/app.12642

Cited by 2 publications

(2 citation statements)

References 20 publications

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“…The decantation process could indeed induce a decantation of the prepolymer, which had a better affinity to the mineral filler, and thereby modify the stoichiometry and decrease T g 20 An overheating of the composite that caused chemical degradation of the polymer 21. The overheating could obviously be a direct result of the longer curing time.…”

Section: Overviewmentioning

confidence: 99%

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Influence of the processing on the completion of curing in epoxy‐based composites

Vouyovitch

Flandin

Merle

et al. 2005

J of Applied Polymer Sci

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Differential scanning calorimetry analysis was used to investigate interrelationships between several thermal parameters and the processing conditions of particle-filled thermosetting resins. On the same piece, obtained by injection molding, epoxy-based composites exhibited sensible differences within a set of measurements of the glass-transition temperature, the width of the transition, the difference in the heat capacity, and the conversion degree. Statistical analysis showed a strong intercorrelation between these thermal parameters, but it could not provide any explanation for the disparities. The dispersion of the measured properties could, in a second step, be directly related to a sample's position with respect to the injection point in the mold. Moreover, even the postcuring stage could not erase this topological effect. As a result, a phenomenological model is proposed that fairly describes the experimental trends. This simple polynomial approach can subsequently be used either to determine the thermal parameters of any point of a molded piece or to shed some light on phenomena responsible for the large variations of the measured quantities.

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Section: Overviewmentioning

confidence: 99%

“…An overheating of the composite that caused chemical degradation of the polymer 21. The overheating could obviously be a direct result of the longer curing time.…”

Section: Overviewmentioning

confidence: 99%

Influence of the processing on the completion of curing in epoxy‐based composites

Vouyovitch

Flandin

Merle

et al. 2005

J of Applied Polymer Sci

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Master curve and time–temperature–transformation cure diagram of lignin–phenolic and phenolic resol resins

Alonso

Oliet

García

et al. 2006

J of Applied Polymer Sci

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The aim of this work is to generate both a master curve of resol resins based on the time-temperature superposition principle and their TTT cure diagrams. The samples used for this purpose were lignin-phenolic and phenol-formaldehyde resol resins. A TMA technique was employed to study the gelation of resol resins. In addition, a DSC technique was employed to determine the kinetic parameters through the Ozawa method, which allowed us to obtain isoconversional curves from the data fit to the Arrhenius expression. Establishing the relationship between the glasstransition temperature and curing degree allowed the determination of the vitrification lines of the resol resins. Thus, using the experimental data obtained by TMA and DSC, we generated a TTT cure diagram for each of resins studied.

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Theoretical evaluation and the effect of thermal degradation on the Time–Temperature–Transformation (TTT) diagram of bisphenol A epoxies

Cited by 2 publications

References 20 publications

Influence of the processing on the completion of curing in epoxy‐based composites

Influence of the processing on the completion of curing in epoxy‐based composites

Master curve and time–temperature–transformation cure diagram of lignin–phenolic and phenolic resol resins

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