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Studying on the curing kinetics of a DGEBA/EMI-2,4/nano-sized carborundum system with two curing kinetic methods
- Source :
-
Polymer . Jul2005, Vol. 46 Issue 16, p6174-6181. 8p. - Publication Year :
- 2005
-
Abstract
- Abstract: Curing kinetics of a bisphenol-A glycidol ether epoxy resin (DGEBA)/2-ethyl-4-methylimidazole (EMI-2,4)/nano-sized SiC(nano-SiC) system was investigated with two kinetic methods by means of differential scanning calorimetry (DSC). Methods I and II were deduced by assuming a constant E and a variable E, respectively. With method I, the cure reaction activation energy E, the frequency factor A and the overall order of reaction m+n are calculated to be 71.75kJmol−1, e20.55 and 2.20, respectively. These results were used to have a simple qualitative comparison with the DGEBA/EMI-2,4 system. With method II, E is proved to decrease initially, and then increase as the cure reaction proceeds. The value of E spans from 42.4 to 95.8kJmol−1. Furthermore, the variations of E were also used to study the cure reaction mechanism, and the shrinking core model was used to study the resin–particle reaction. Methods I and II are effective as long as they are used in proper aspects. With these two methods used all together, we can have a comprehensive and in-depth understanding of the curing kinetics of the DGEBA/EMI-2,4/nano-SiC system and the effect of nano-SiC particles on the curing kinetics of the DGEBA/EMI-2,4 system. [Copyright &y& Elsevier]
- Subjects :
- *PHENOL
*EPOXY resins
*SYNTHETIC gums & resins
*IMIDAZOLES
*NANOPARTICLES
Subjects
Details
- Language :
- English
- ISSN :
- 00323861
- Volume :
- 46
- Issue :
- 16
- Database :
- Academic Search Index
- Journal :
- Polymer
- Publication Type :
- Academic Journal
- Accession number :
- 18132629
- Full Text :
- https://doi.org/10.1016/j.polymer.2005.03.114