Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
The bisphenol A-type phthalonitrile (BAPH) was blended with the classic epoxy system E51/DDS to prepare the epoxy/phthalonitrile thermoset. The curing kinetics were investigated by differential scanning calorimetry (DSC) using the isoconversional principle, and the average activation energy (E) of the E51/DDS curing reaction was found to decrease from 87 kJ/mol to 68.6 kJ/mol. Combining the results of the rheological study, the promoting effect of phthalonitrile on the crosslink of epoxy/amine is confirmed. The curing reaction of the blended resin was characterized using FTIR, and the results showed that BAPH could react with DDS. The thermal behaviors of the thermosets were investigated via DMA and TGA. The glass transition temperature (T) is found to increase from 181 °C to 195 °C. The char yield increases from 16% to 59.6% at 800 °C in a N atmosphere, which is higher than the calculated value based on the proportional principle. The AFM phase images show that there is no phase separation in the cured thermoset. The results imply that the cured epoxy/amine/phthalonitrile blend is probably a kind of copolymer. The real-time TG-MS indicated that the pyrolysis of the thermoset can be divided into two relatively independent stages, which can be assigned to the cleavage of the E51/DDS network, and the phthalocyanine/triazine/isoindoline, respectively.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11395949 | PMC |
| http://dx.doi.org/10.3390/ma17174411 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Investigation on the Curing and Thermal Properties of Epoxy/Amine/Phthalonitrile Blend.
Materials (Basel)
September 2024
College of Fiber Engineering and Equipment Technology, Jiangnan University, Wuxi 214401, China.
Article Synopsis
- The study focused on blending bisphenol A-type phthalonitrile (BAPH) with an epoxy system (E51/DDS) to create a new thermoset material and assessed its curing process using differential scanning calorimetry (DSC).
- Results showed a decrease in activation energy for the curing reaction and confirmed that the phthalonitrile enhanced the crosslinking of the epoxy/amine system.
- Characterization techniques like FTIR, DMA, and TGA indicated improved thermal properties, such as a higher glass transition temperature and increased char yield during pyrolysis, suggesting the formation of a copolymer with no phase separation.