Cured Properties
Composition:
- 100 pbw digylcidyl ether of bisphenol A (Epon 828)
- 20 pbw aromatic amine curing agent Ancamine Z
- 100 pbw mica (4X Mineralite from Mineral Mining Corp.)
- Cured 24 hours at 93C
- Tg of fully cured 828/Z is ~170C
- For isothermal cure, reaction quenches when Tg exceeds the cure temperature
- Tg can only achieve about 25C above the cure temperature, so cure at 93C yields Tg of ~ 118C
- Determination of fully cure Tg required higher temperature post cure
- Since 93C cure is incomplete, excursions above 93C for characterization will result in continued cure
- Therefore, a master curve cannot be obtained and characterization of G’, CTE, and Cp above Tg of “as-cured” material is not valid