| _version_ | 1866901555939115008 |
|---|---|
| author | Jae-Rock Lee Soo-Jin Park Yeung-Keun Kim |
| author_facet | Jae-Rock Lee Soo-Jin Park Yeung-Keun Kim |
| contents | A newly developed cationic catalyst, N-Benzylpyrazinium hexafluoroantimonate (BPH) has been used to cure epoxies. The effect of the catalyst concentrations on the thermal and mechanical properties has been studied. The used catalyst concentrations are 0.5, 1, 2, 3 and 5wt.%. Two given maximum retention times, i.e., 1028 hours at 265�C and 8 hours at 300�C were studied in terms of the mechanical flexural and impact properties in the presence of different concentrations of BPH in air condition. The BPH cured epoxies showed excellent thermo-oxidative resistance. Their mechanical properties nearly remained intact for the short retention times less than 12 hours. The maximum weight losses were about 4.5wt.% at 300�C and 12wt.% at 265�C. At 265�C, the finally retained flexural and impact strengths were respectively more than 30% and 40% on the basis of their initial values after the very long retention time of 1028 hours for the adequate catalyst concentrations of 1 and 2 wt. %. |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_15419444 |
| institution | Zenodo |
| language | |
| publishDate | 1999 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | THE MECHANICAL PROPERTY CHANGE OF A NEWLY DEVELOPED EPOXY SYSTEM AT HIGH TEMPERATURE AND OXIDATIVE CONDITIONS Jae-Rock Lee Soo-Jin Park Yeung-Keun Kim A newly developed cationic catalyst, N-Benzylpyrazinium hexafluoroantimonate (BPH) has been used to cure epoxies. The effect of the catalyst concentrations on the thermal and mechanical properties has been studied. The used catalyst concentrations are 0.5, 1, 2, 3 and 5wt.%. Two given maximum retention times, i.e., 1028 hours at 265�C and 8 hours at 300�C were studied in terms of the mechanical flexural and impact properties in the presence of different concentrations of BPH in air condition. The BPH cured epoxies showed excellent thermo-oxidative resistance. Their mechanical properties nearly remained intact for the short retention times less than 12 hours. The maximum weight losses were about 4.5wt.% at 300�C and 12wt.% at 265�C. At 265�C, the finally retained flexural and impact strengths were respectively more than 30% and 40% on the basis of their initial values after the very long retention time of 1028 hours for the adequate catalyst concentrations of 1 and 2 wt. %. |
| title | THE MECHANICAL PROPERTY CHANGE OF A NEWLY DEVELOPED EPOXY SYSTEM AT HIGH TEMPERATURE AND OXIDATIVE CONDITIONS |
| url | https://doi.org/10.5281/zenodo.15419444 |