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Epoxy polymers

Use and misuse of non-isothermal DTA and DSC in the study of the curing process

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Abstract

The current use of non-isothermal DTA or DSC for the investigation of polymers is based upon assumptions which allow a number of conclusions supported only by data drawn from the DTA or DSC traces of prepolymer samples.

A more adequate procedure involving the analysis of the DTA or DSC traces of several samples previously cured to different polymerization degrees under isothermal conditions is proposed.

A comparison of the results obtained with the two procedures is reported for two composite materials.

Zusammenfassung

Die z.Z. übliche Verwendung der nicht-isothermen DTA oder DSC zur Untersuchung von Polymeren beruht auf Annahmen, die eine Anzahl von Schlussfolgerungen erlauben, die nur durch aus DTA- und DSC-Verläufen von Präpolymerproben erhaltenen Daten gestützt werden. Eine angemessene Prozedur wird vorgeschlagen, die die Analyse von DTA-oder DSC-Verläufen mehrerer, unter isothermen Bedingungen bis zu verschiedenen Graden polymerisierter Proben in sich einschliesst. Die beiden Methoden werden anhand der für zwei Material kompositionen erhaltenen Ergebnisse verglichen.

Резюме

Обычное использован ие неизотермической ДТА или ДСК для исследова ния полимеров основывае тся на предположения х, допускающих ряд закл ючений, сделанных на основе ДТА и ДСК исс ледований мономерны х компонент. Предложен более одно значный метод, включающий ана лиз ДТА-и ДСК-кривых нескольких образцов, предварительно подвергнутых вулкан изации в изотермичес ких условиях до различно й степени полимеризации. Для дв ух компонентных соед инений проведено сопоставл ение результатов, получен ных этими двумя метод ами.

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Work supported by “Progetto Finalizzato Chimica Fine e Secondaria” del CNR, grant N. 82.01137.95.

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Schiraldi, A., Baldini, P. Epoxy polymers. Journal of Thermal Analysis 28, 295–301 (1983). https://doi.org/10.1007/BF01983263

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  • DOI: https://doi.org/10.1007/BF01983263

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