Table 1 Parameters obtained from fitting an exponential decay function; y = y0 + Aex/t, to the surface energy data of the stored CFs conditioned at 30 °C.
From: On the detection of carbon fibre storage contamination and its effect on the fibre–matrix interface
Energy Type | CF Storage | Energy (mJ m−2) | Decay Constant (t) | ||
|---|---|---|---|---|---|
Average y(1) | Maximum y(0) | Range (A) | |||
Dispersive(\({{\boldsymbol{\gamma }}}_{{\boldsymbol{S}}}^{{\boldsymbol{D}}}\)) | Spool | 40.7 | 100.2 | 59.5 | 0.093 |
Bag, 15 days | 43.2 | 91.3 | 48.1 | 0.069 | |
Bag, 1 month | 45.0 | 77.0 | 32.0 | 0.046 | |
Bag, 2 months | 44.0 | 72.1 | 28.2 | 0.042 | |
Specific (\({{\boldsymbol{\gamma }}}_{{\boldsymbol{S}}}^{{\boldsymbol{AB}}}\)) | Spool | 23.1 | 61.4 | 38.2 | 0.063 |
Bag, 15 days | 23.6 | 59.2 | 35.6 | 0.057 | |
Bag, 1 month | 21.2 | 49.4 | 28.2 | 0.046 | |
Bag, 2 months | 18.1 | 43.7 | 25.6 | 0.047 | |
Total (\({{\boldsymbol{\gamma }}}_{{\boldsymbol{S}}}^{{\boldsymbol{T}}}\)) | Spool | 64.7 | 161.2 | 96.5 | 0.079 |
Bag, 15 days | 67.0 | 150.4 | 83.5 | 0.063 | |
Bag, 1 month | 66.1 | 126.3 | 60.2 | 0.046 | |
Bag, 2 months | 62.1 | 115.8 | 53.7 | 0.044 | |
