Abstract
The curing performance of two epoxy resin systems has been investigated using the microbond test and FTIR spectroscopy. A novel sample preparation technique involving curing epoxy droplets on thin steel filaments allowed for high-throughput determination of microbond droplet cure state using a conventional benchtop spectrometer. Parity between steel filament and glass fibre microbond samples was confirmed by infrared microspectroscopy. It is shown that cure schedules used in the manufacture of composite parts produced microbond droplets with degrees of cure lower than that of bulk matrix specimens subjected to an identical thermal history. For a commercial resin system, testable microbond droplets could only be produced when a room temperature pre-curing time of at least 2 hours was introduced. It is concluded that microbond testing be supported by some method of droplet cure state characterisation to ensure that interfacial effects are not artefacts of droplet sample preparation.
| Original language | English |
|---|---|
| Pages | 1-8 |
| Number of pages | 8 |
| Publication status | Published - 30 Jun 2022 |
| Event | The 20th European Conference on Composite Materials: Composites Meet Sustainability - Lausanne, Switzerland Duration: 26 Jun 2022 → 30 Jun 2022 Conference number: 20th https://eccm20.org/ |
Conference
| Conference | The 20th European Conference on Composite Materials |
|---|---|
| Abbreviated title | ECCM20 |
| Country/Territory | Switzerland |
| City | Lausanne |
| Period | 26/06/22 → 30/06/22 |
| Internet address |
Keywords
- glass fibres
- epoxy resin
- interfacial shear strength
- microbond test
- infrared spectroscopy