| Autor: |
A. Fainleib, O. Grigoryeva, O. Starostenko, A. Vashchuk, S. Rogalsky, D. Grande |
| Jazyk: |
angličtina |
| Rok vydání: |
2016 |
| Předmět: |
|
| Zdroj: |
eXPRESS Polymer Letters, Vol 10, Iss 9, Pp 722-729 (2016) |
| Druh dokumentu: |
article |
| ISSN: |
1788-618X |
| DOI: |
10.3144/expresspolymlett.2016.66 |
| Popis: |
The polycyclotrimerization reaction of dicyanate ester of bisphenol E (DCBE) in the presence of varying amounts (from 0.5 to 5 wt%) of 1-octyl-3-methylimidazolium tetrafluoroborate ([OMIm][BF4]) ionic liquid has been investigated using differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FTIR) techniques, after a curing stage at 150 °C for 6 h. It is noteworthy that an amount of [OMIm][BF4] as low as 0.5 wt% accelerates dramatically the thermal curing process leading to the formation of a polycyanurate network. The conversion of DCBE increased with increasing [OMIm][BF4] content in the temperature range studied. A reaction mechanism associated with the ionic liquid-catalyzed DCBE polycyclotrimerization is newly proposed via the involvement of a [CN]δ+–[OMIm]δ– complex as a key intermediate. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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