Abstract
In this work, the novel fluorine-containing epoxy resin, 2-diglycidylether of benzotrifluoride (DGEBTF), was prepared and the chemical structure of DGEBTF was confirmed by FT-IR, 13C NMR and 19F NMR spectroscopy. Also, the properties of DGEBTF/diaminodiphenyl methane (DDM) and well-known diglycidylether of bisphenol A (DGEBA)/DDM systems were investigated. As a result, the dielectric constant values of DGEBTF/DDM system were 15% lower than those of DGEBA/DDM system. The critical stress intensity factor and impact strength of DGEBTF/DDM and DGEBA/DDM systems were 5.63 MPa m1/2, 50 kN/m2 and 3.53 MPa m1/2, 26 kN/m2, respectively. The introduction of trifluoromethyl (CF3) group into the chain of the epoxy resin resulted in improving the dielectric and mechanical properties and enormously lowered the Tg (105 °C) of the studied DGEBTF/DDM. It comes from the internal network change of cured resin.
| Original language | English |
|---|---|
| Pages (from-to) | 650-654 |
| Number of pages | 5 |
| Journal | Surface and Coatings Technology |
| Volume | 180-181 |
| DOIs | |
| Publication status | Published - 1 Mar 2004 |
| Externally published | Yes |
Keywords
- Activation energy
- Critical stress intensity factor
- Cure behavior
- Dielectric constant
- Epoxy resins
- Fluorine