Modification of DGEBA with diimide–diacids derived from bicyclo[2.2.2]oct-7-ene-2,3,5,6-tetracarboxylic dianhydride and crosslinking study
✍ Scribed by M. Galià; D. Monte; A. Serra; A. Mantecón; V. Cádiz
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 488 KB
- Volume
- 60
- Category
- Article
- ISSN
- 0021-8995
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✦ Synopsis
Epoxy resins derived from diimide-diacids obtained from bicyclo[2.2.2]oct-7-en-2,3,5,6tetracarboxylic dianhydride and diglycidyl ether of bisphenol A were synthesized and characterized by spectroscopic techniques and thermal analyses. A further crosslinking using hydroxylic groups using dianhydride or diisocyanate as a hardener was also carried out. These processes led to crosslinked materials, but a DSC study does not show a straightforward relationship between the amount of hardener used and reaction enthalpies, which suggests a complicated reaction mechanism. On the other hand, only a slight increase in TB values was observed during the curing process. NO substantial differences between the thermal characteristics of linear and crosslinked polymers were observed.