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