Journal ArticleDOI
Study of curing of epoxy resins by acid anhydrides using differential scanning calorimetry
TLDR
In this paper, the course and kinetics of the curing of epoxy resins by acid anhydrides were studied by differential scanning calorimetry (DSC), and the reaction order and rate constants were evaluated.Abstract:
Course and kinetics of the curing of epoxy resins by acid anhydrides were studied by differential scanning calorimetry (DSC). The heat of reaction at 107.5°C was found to lie between −302.2to −333.2 J/g (−72.2 to −79.6 cal/g), depending on the composition of the reaction system. For one reaction system measurements were made at three different temperatures. From DSC data the reaction order and rate constants were evaluated. Between 18 to 80% conversion the curing reaction was found to be 0.5 order, and from 80 to 98% conversion to be first order. From the rate constants using the Arrhenius equation the activation energy was calculated. The values of the activation energy are 58.2 KJ/mol (13.9 kcal/mol) for 0.5 order and 56.1 KJ/mol (13.4 kcal/mol) for first order reaction.
Unter Anwendung der Differential-Scanning-Calorimetrie (DSC) wurden der Verlauf und die Kinetik der Hartung von Epoxid-Harzen untersucht. Es wurde gefunden, das die Reaktionswarme bei 107,5°C, in Abhangigkeit von der Zusammensetzung des Reaktionssystems, zwischen −302,2 und −333,2 J/g (−72,2 bis −79,6 cal/g) betragt. Fur ein System wurden die Messungen bei drei verschiedenen Temperaturen durchgefuhrt. Aus den DSC-Kurven wurden die Reaktionsordnung und die Reaktionsgeschwindigkeitskonstanten bestimmt. Es wurde gefunden, das die Reaktion zwischen 18 und 80% Umsatz nach der Ordnung 0,5 und zwischen 80 und 98% Umsatz nach der ersten Ordnung verlauft. Aus den Geschwindigkeitskonstanten wurden nach der Arrheniusschen Gleichung die Aktivierungsenergien ausgerechnet, und zwar fur die 0,5te Ordnung 58,2 KJ/mol (13,9kcal/mol) und fur die erste Ordnung 56,1 KJ/mol(13,4kcal/mol).read more
Citations
More filters
Book ChapterDOI
The application of differential scanning calorimetry (DSC) to the study of epoxy resin curing reactions
TL;DR: In this article, the use of differential scanning calorimetry (DSC) as a method of monitoring and investigating the kinetics of epoxy resin curing reactions is discussed.
Book ChapterDOI
Anionic copolymerization of cyclic ethers with cyclic anhydrides
Jozef Lustoň,František Vašš +1 more
TL;DR: In this article, the results obtained for the anionic copolymerization of cyclic ethers with cyclic anhydrides were summarized and analyzed, and the results were used for the preparation of linear polyesters with special functional pendant groups.
Journal ArticleDOI
Determination of cure times and activation energies of one-container epoxy resin systems by isothermal DSC☆
R.L. Miller,M.A. Oebser +1 more
TL;DR: In this paper, the effect of catalysis on the activation energy of one-container epoxy resins was discussed and two isothermal techniques on a DSC were used to determine the cure times and activation energies.
Journal ArticleDOI
Application of thermal analysis for the investigation of epoxy resins
J. Sickfeld,W. Mielke +1 more
TL;DR: Application de l'analyse thermique differentielle de la calorimetrie differentialle, de la thermogravimetrie, de the thermodilatometrie, of l'analysis thermomecanique et de la theromecanometrie dynamique.
Related Papers (5)
Differential scanning calorimetry of epoxy cure: isothermal cure kinetics☆
S. Sourour,Musa R. Kamal +1 more
The curing reaction of an epoxide resin with 2-ethyl-4-methylimidazole, a calorimetric study of the kinetics of formation of epoxide-imidazole adducts
John M. Barton,Peter M. Shepherd +1 more