Table 4. Effect of Additive on Cross-Link Density of Polybenzoxazinesa.
cross-link density (×10–3 mol cm–3) |
||||
---|---|---|---|---|
benzoxazine | pure resin | 5% TDP | 10% TDP | 5% TDA |
PBA-a | 5.81 | 7.71 | 4.41 | 8.45 |
PBF-a | 5.98 | 10.71 | 7.33 | |
PBT-a | 8.51 | 12.80 | 7.40 |
Values calculated from duplicate DMTA measurements.