Abstract
The effect of the novel N-crotyl-N,N-dimethyl-4-methylanilinium hexafluroantimonate (CMH) initiator on cure kinetics and rheological properties of diglycidylether of bisphenol A (DGEBA) epoxy cationic system was investigated. From DSC measurements of the DGEBA/CMH system, it was found that this system exhibited excellent thermal latent characteristics at a given temperature and revealed complex cure behavior as indicated by multiple exotherms. The conversion and conversion rate of the DGEBA/CMH system increased with increasing the concentration of initiator, attributed to the high activity of CMH. Viscoelastic properties during gel formation of DGEBA initiated by CMH were investigated by rheological techniques under isothermal conditions. The gel time obtained from the modulus crossover point t(G′) = G″ was affected by a high curing temperature and the concentration of CMH, resulting in a high degree of network formation in cationic polymerization.
| Original language | English |
|---|---|
| Pages (from-to) | 2397-2406 |
| Number of pages | 10 |
| Journal | Journal of Polymer Science, Part B: Polymer Physics |
| Volume | 39 |
| Issue number | 20 |
| DOIs | |
| Publication status | Published - 15 Oct 2001 |
| Externally published | Yes |
Keywords
- Cationic polymerization
- Cure kinetics
- DGEBA
- Rheological properties
- Thermal latent initiator