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Investigation of thermally activated or photoinitiated polymerization by DSC

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Abstract

Differential scanning calorimetry is undoubtedly one of the most powerful techniques for investigating the reactions leading to thermoplastic or thermosetting materials. The conditions for the obtaining of reliable experimental results are summarized. A mechanism for the curing of epoxyamine systems is suggested, which is capable of describing the behaviour of stoichiometric and nonstoichiometric mixtures up to high reaction degrees. The advantage of coupling a DSC instrument with a device for the photochemical activation of polymerizations is demonstrated by some examples.

Zusammenfassung

Die Differential-Scanning-Kalorimetrie (DSC) gehört ohne Zweifel zu den leistungsfähigsten Methoden der Untersuchung von Bildungsreaktionen thermoplastischer und thermisch härtbarer Substanzen. Die Bedingungen zur Gewinnung zuverlässiger experimenteller Ergebnisse werden zusammengestellt. Für die Härtung von Epoxid-Amin-Systemen wird ein Mechanismus vorgeschlagen, der das Verhalten stöchiometrischer und nichtstöchiometrischer Mischungen bis zu hohen Umsätzen beschreiben kann. Die Vorzüge der Kopplung eines DSC-Instruments mit einer Einrichtung für die photochemische Aktivierung von Polymerisationen wird an einigen Beispielen demonstriert.

Резуме

Дифференциальная ск анирующая калоримет рия несомненно является одним из самых мощных методов иссле дования реакций полу чения термопластических и термореактивных материалов. Обобщены условия для получени я приемлемых эксперим ентальных результат ов. Предложен механизм о тверждения эпокси-ам ино систем, описывающий поведен ие стехиометрически х и нестехиометрическ их смесей до высоких с тепеней их превращения. На неско льких примерах показано преимущест во соединения ДСК апп аратуры с устройством для фото химической активации реакций по лимеризации.

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  1. Sektion Chemie, Fridrich-Schiller-Universität Jena, Steiger 3, 6900, Jena, GFR

    H. J. Flammersheim

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  1. H. J. Flammersheim
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Flammersheim, H.J. Investigation of thermally activated or photoinitiated polymerization by DSC. Journal of Thermal Analysis 33, 55–65 (1988). https://doi.org/10.1007/BF01914584

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