1 Introduction
2 Materials and methods
2.1 Material and samples
2.2 Adsorption and desorption experiment
2.3 Impact strength
2.4 Creep
3 Results and discussion
3.1 Adsorption and desorption
3.2 Mass loss
3.3 Impact strength
MC | Treatment option | Tangential | Radial | ||
---|---|---|---|---|---|
MOE (MPa) | Rc (MPa) | MOE (MPa) | Rc (MPa) | ||
6% | Unmodified | 927a ± 109 | 5.61a ± 0.37 | 2289ab ± 81 | 9.04b ± 0.38 |
Modified @180 °C | 942a ± 100 | 5.93a ± 0.49 | 2246b ± 78 | 9.82a ± 0.36 | |
Modified @200 °C | 909a ± 58 | 5.60a ± 0.47 | 2343a ± 65 | 9.94a ± 0.94 | |
Above FSP | Unmodified | 216b ± 28 | 1.01b ± 0.12 | 545b ± 24 | 2.62b ± 0.30 |
Modified @180 °C | 207b ± 17 | 1.02b ± 0.07 | 526b ± 34 | 2.55b ± 0.14 | |
Modified @200 °C | 274a ± 35 | 1.67a ± 0.33 | 808a ± 79 | 3.59a ± 0.53 |
3.4 Creep
τ (h) | Unmodified | Modified @ 80 °C | Modified @ 200 °C | |||||||
---|---|---|---|---|---|---|---|---|---|---|
A
|
B
|
R
2
|
A
|
B
|
R
2
|
A
|
B
|
R
2
| ||
Tangential | 1 | − 0.705 | 0.798 | 0.878 | − 0.878 | 0.679 | 0.883 | − 1.264 | 0.782 | 0.924 |
2 | − 0.531 | 0.998 | 0.895 | − 0.646 | 0.842 | 0.902 | − 0.924 | 0.982 | 0.921 | |
4 | − 0.398 | 1.241 | 0.936 | − 0.480 | 1.029 | 0.931 | − 0.676 | 1.159 | 0.937 | |
6 | − 0.311 | 1.343 | 0.945 | − 0.407 | 1.160 | 0.948 | − 0.567 | 1.254 | 0.953 | |
12 | − 0.197 | 1.441 | 0.956 | − 0.306 | 1.393 | 0.970 | − 0.420 | 1.396 | 0.977 | |
24 | − 0.143 | 1.541 | 0.969 | − 0.240 | 1.571 | 0.991 | − 0.322 | 1.474 | 0.989 | |
48 | − 0.132 | 1.711 | 0.985 | − 0.207 | 1.643 | 0.997 | − 0.263 | 1.450 | 0.993 | |
72 | − 0.133 | 1.782 | 0.988 | − 0.196 | 1.651 | 0.998 | − 0.245 | 1.434 | 0.994 | |
Radial | 1 | − 2.267 | 1.309 | 0.843 | − 2.224 | 1.002 | 0.874 | − 4.167 | 0.670 | 0.921 |
2 | − 1.906 | 1.686 | 0.864 | − 1.977 | 1.240 | 0.889 | − 3.490 | 0.997 | 0.919 | |
4 | − 1.644 | 2.108 | 0.887 | − 1.672 | 1.484 | 0.906 | − 2.847 | 1.339 | 0.928 | |
6 | − 1.484 | 2.353 | 0.904 | − 1.460 | 1.627 | 0.927 | − 2.517 | 1.531 | 0.940 | |
12 | − 1.149 | 2.648 | 0.905 | − 1.117 | 1.876 | 0.959 | − 1.932 | 1.838 | 0.957 | |
24 | − 0.819 | 2.642 | 0.977 | − 0.839 | 2.038 | 0.986 | − 1.406 | 2.059 | 0.967 | |
48 | − 0.639 | 2.555 | 0.997 | − 0.638 | 1.959 | 0.992 | − 1.103 | 2.088 | 0.974 | |
72 | − 0.601 | 2.533 | 0.999 | − 0.575 | 1.896 | 0.995 | − 1.001 | 2.051 | 0.979 |