Abstract
Over the past few years there have been several papers published on electron beam (EB) cured epoxy resins and composites. However, there has been little published work comparing the properties of identical epoxy resin formulations cured either by electron beam or thermal means. Also, there has been little published data on the effects of changing EB processing parameters. In this work we evaluated the effects on the loss modulus glass transition temperature by varying the resin composition and the processing parameters. The parameters selected for the EB curable resins, Tactix 123 (bisphenol A epoxy) and (4-octyloxyphenol)phenyliodonium hexafluoroantimonate initiator: initiator concentration (1 - 3 phr); curing dose (80 - 140 kGy); and dose per pass (5 or 20 kGy per pass). Identical epoxy resin formulations were also cured thermally (177°C for 3 hours). Comparisons were made using dynamic mechanical analysis. Results from this work demonstrated that the glass transition temperatures for EB and thermally cured epoxy resins were optimum for formulations having initiator concentrations between 1.5 and 2.0 phr. Research in this area is continuing.
| Original language | English |
|---|---|
| Pages (from-to) | I/- |
| Journal | International SAMPE Symposium and Exhibition (Proceedings) |
| Volume | 44 |
| State | Published - 1999 |
| Externally published | Yes |
| Event | Proceedings of the 1999 44th International SAMPE Symposium and Exhibition 'Envolving and Revolutionary Technologies for the New Millennium', SAMPE '99 - Long Beach, CA, USA Duration: May 23 1999 → May 27 1999 |