Synthesis of maleimide modified imidazole derivatives and their application in one-component epoxy resin systems
| Autor: | Qiaoxin Zhang, Jun Wang, Yefa Hu, Shuang Yang, Guoping Ding |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Addition reaction
Materials science Hydrogen bond Mechanical Engineering 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Nucleophile chemistry Mechanics of Materials Polymer chemistry Polar effect Moiety Imidazole General Materials Science 0210 nano-technology Maleimide Curing (chemistry) |
| Zdroj: | Materials Letters. 234:379-383 |
| ISSN: | 0167-577X |
| Popis: | A series of novel maleimide modified imidazole derivatives were successfully synthesized through the addition reaction between N-(4-hydroxyphenyl) maleimide (HPM) and imidazole compounds with 1-position N H bond. The maleimide modified imidazole derivatives were blended with epoxy resin (EP) to evaluate their reactivity and thermal latency. Compared with the common EP/imidazoles systems, the curing exothermic interval of the EP systems containing maleimide modified imidazole derivatives shifted to higher temperature regions. Moreover, the EP systems containing maleimide modified imidazole derivatives had much longer pot life under room temperature. The enhanced latency of maleimide modified imidazole derivatives was attributed to the strong electron withdrawing effect of maleimide group, which reduced the nucleophilicity of imidazole moiety. Notably, the maleimide modified imidazole derivatives regained fast curing ability towards EP by overcoming the curing reaction energy barrier under heating condition. |
| Databáze: | OpenAIRE |
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