Sample | C-C/C-H area% | C-O area% | C-N area% | C=O area% | C-O/(C-C/C-H) (A) (area ratio) | A surface/ A bottom | C-O(surface)/ C-O(bottom) |
PU-surface | 46.7 | 45.4 | 4.0 | 3.8 | 0.972 | 1.516 | 1.243 |
PU-bottom | 56.9 | 36.5 | 2.2 | 3.1 | 0.641 | ||
LPU1-surface | 49.7 | 45.7 | 2.4 | 2.2 | 0.919 | 1.375 | 1.225 |
LPU1-bottom | 55.8 | 37.3 | 2.1 | 3.2 | 0.668 | ||
LPUT1-surface | 49.8 | 45.4 | 2.8 | 2.0 | 0.911 | 1.186 | 1.107 |
LPUT1-bottom | 53.4 | 41.0 | 4.2 | 1.5 | 0.768 | ||
LPUT2-surface | 46.7 | 43.2 | 2.2 | 3.5 | 0.925 | 1.094 | 1.000 |
LPUT2-bottom | 51.1 | 43.2 | 2.1 | 2.4 | 0.845 | ||
LPUT3-surface | 56.3 | 39.4 | 1.8 | 2.5 | 0.700 | 1.092 | 1.091 |
LPUT3-bottom | 56.3 | 36.1 | 3.2 | 3.4 | 0.641 |